What is your mages armory by chance?
How much damage off your lance do you lose from not using the crit meta? is it noticable?
Depends on your modifiers, normal meta is a pretty significant damage loss as well when you trade it in for legendary, losing 1.5k~ on low end lances and 3-4k on high end ones.
most games people are dispel happy and strip a mage of any and all buffs quite frequently and if there are no rolling hots / motw / whatever else you think you may have up is NOT up then you're pretty much giving that proc up for free.
if a mage stealing it doesnt happen ... a dispel is going to get it.
Yes, i'm assuming i'm not stripped of buffs when it procs because 1) It procs on opener most of the time when i'm fully hotted, have AB/MOTW/Alters/Temps going. When you get purged, the most efficient thing you can do for your damage is reapply buffs during globals where you won't be able to efficiently cast, 10% Spell Power and 5% ( 10 technically for mages ) crit is so undervalued and more mages really need to focus on rebuffing. As far as hots go, well, yes, I assume those are always being constantly reapplied, I don't think its a far stretch.
I think you're vastly overlooking the meta shift of arena this season, games aren't constantly hunter+priest or double/triple purge teams anymore, you're dealing with majority Mage/Druid mirrors where you only deal with 1 dispel and its not a constant. Mages are not constantly getting purged every single match in higher-end arena, yes you get purged and cleaned off as thats a priority, but rebuffing is also a priority, and with the current state of the game, healers can't just jack off spending time purging you or their team is going to die any time they show vulnerability in either health pools or positioning. At best, the only class that can afford the time to purge you in 3s is an Ele shaman which have seen somewhat a dip in popularity and for the most part flop to mage teams.
As far as noticing it, i'll take the chances that I actually pay attention to my procs more than my opponent, especially considering the rarity of the meta and the fact that in the current state of the game it is far easier to protect my buffs than it is for my opponents to take them.
On top of that, the tank meta is extremely nice in rogue mage/warrior mage matchups.
Total hours would vary, but the whole questline takes a little over a month worth of weekly resets, two if you're unlucky. Keep in mind the meta was great last season, this season, and will be for next season as well.