With the massive amounts of changes in WoD and the nerfs to CC, you cannot allow instant-cast healing to remain as strong as it is right now. They most definitely seem irrational at this point in time but until we actually see how arena plays out in WoD with the rest of the planned changes, I wouldn't jump to conclusions quite yet.
Hello, i'm Piecez If any of you intermediate players happen to come across me in arena and would like for me to point out your mistakes or give you some basic guidelines, I generally remember most matchups I play and would be happy to help ^^ Just contact me in game or through AJ and tell me your names/comp. My mages in-game are Reesezpiecez and Angiexo on Tichondrius.
I posted some guidelines on how to handle cleaves in a thread some time ago - though these aren't strictly survival tips or class specific, they will ultimately help you live better against cleaves -, and I received quite a numerous amount of kind whispers telling me how helpful it was ^^, hopefully you'll find it informative, heres a link, few posts down. Keep in mind some of the information is a bit dated, but the general principles should still apply.
Just going to drop some small tips because learning how to kite and cast efficiently against melee cleaves is something that comes with experience and is a lesson that can't really be absorbed through text. Much of how to play against cleaves largely depends on what you're playing, and the type of cleave the other team is playing, so if you have a specific cleave you're having trouble with, it'd be easier to give advice.
1) If you're playing with a class that can stun for you, always be looking for RoF opportunities. A common strat for me as WMD back in the day was get a double shockwave on the melee training me, RoF them, swap the healer hard with a charge>Deep+Orb, rinse repeat and keep forcing cooldowns
2) If you aren't playing with a class that will allow you to utilize RoF effectively, play Ice Ward. Seriously, it helps a ton. Its a seperate DR entirely from your novas, it becomes very simple to abuse dispel CD mechanics if a healer dispels a poly, a warrior breaks a ice ward root, then has to sit a full 8 second root, you can do a ton in 8 seconds.
Side note: When gates open, you can apply Ice Ward then invis, it lasts 30 seconds with a 20 second CD.
3) As Mage/Priest/X vs X/Feral/Healer, it is incredibly important to realize that your healer will most likely never be able to get effective fears on an intelligent healer, so the best way to relieve pressure and get counter pressure going is to fear the Feral on CD and covering it with a blanket/deep/poly on their healer.
4) Speaking of counter pressure, it is literally the only effective peel you have against some cleaves ( Mostly ones that can't be peeled anyway, like TSG or PHD ), make sure you aren't bursting into defensive cooldowns, its a no brainer, but its super important to take advantage of, cleaves tend to mongo their defensive CDs to stay offensive.
Everything you use to stay defensive is almost a setback, try to use your cooldowns as offensively and efficiently as possible, only alter time defensively if you have to, and if you have to, make sure you're getting the most out of it ( PoM+Alter, Poly healer, alter back, RoF both DPS for an offensive setup ). On that note, if you're going offensive, make sure you healer uses a CD to keep you up instead of you just blocking midway through your damage CDs.
5) Positioning is really key, keep pulling the cleave behind pillars, make their healer come out and be vulnerable, best way to make a cleave second guess themselves and capitalize.
6) If its a cleave where you HAVE to use everything defensively, have a set plan of how to space out your defensives i.e. Temp shield opener, block, alter time, temp shield, - healer CD -, block, etc. Thats not how you should do it every time, but think about whats going to work in your favor.
Really the key notes are to have your teammates CC for small windows to allow you breathing room to actually do stuff, stay offensive as you can, and abuse the fact that since they're training you, you ultimately control the positioning and flow of the entire game.
Tailoring/Stat profession is hands down the best imo unless you play a comp where you can actually utilize engi gloves in burst windows ( Godcomp for example, where on-use can be used with orb, engi gloves can be used for the deeps inbetween orbs ), or if you aren't human and you're constantly facing teams where you have to use a medallion - RMX/WMX
I wouldn't necessarily say its that clicking is going to make you stagnate at 1600, rather though that if you are the type of person that cannot be bothered to change something as simple as going from clicking to keybinding, how can you expect that person to actually make strides in the improvement of their own gameplay and advance their knowledge of arena?
Essentially WoW arena is about your knowledge of the game and its mechanics, your decision making, and your ability to maintain composure with your team. WoW isn't an FPS that requires constant twitch reflexes and adrenaline pumping in order to be competitive, its a game of thought and risk-reward analysis, not much of it is related to your mechanical abilities.
Certainly if I were to go about unbinding everything and started clicking, once I was used to it i'd still be capable of doing moderately well, due to just that I understand the game and how to play it, and its not mechanically taxing, but its the fact that I was the type of player that DID go through the effort of binding everything, having arena123 macros, min-maxing my efficiency, that naturally made me the type of person who went through the effort of understanding the game as well.