I honestly don't support the idea of removing the titles from the 5v5 bracket. It's not like many titles get rewarded anyway. It's only going to make the bracket less active then it already is. I would agree it is a little easier to get a title in 5s at the moment, but if you can get 5 good players online at the same time then go for it.
I just remember my best moments in arena when I played it seriously, was in 5s (which I have only got 1 glad title from). It's quite hard to describe the adrenaline when having a full roster of rank1's vs another full roster of rank1's. The games last longer (usually) and are a lot more fun in my opinion.
I just don't think its a step in the right direction.