Boosts have killed this game.

Unknown

Your game is totally broken.
Since boosts can't be used abusively i've noticed one thing : Boosts were hiding the fact that this game is totally unbalanced and broken.

If you can't win fast and so not be too damaged (with boosts) your heroes are severely injured, sometimes killed. And how can you manage this when you have to wait more than 3 hours to be able to use them again ?
You want us to fight some very high heroes (230), some of them have powers that have never been implemented to be so high (Bullseye, only lvl 69 usually), but we are only at best lvl 85 with nerfed or not very useful powers, sounds sadist to me, and at best very unfair.

The only thing that was keeping this game from crumbling was this damned boosts, things that were obviously here to make people purchase some temporary virtual ****.

You want variety, happy players, remove this damned boosts once and for all, add useful & various heroes, work again on ones that nobody play with (for obvious reasons) instead of stupidly nerfing them one by one until you understant one thing: You shouldn't have to nerf heroes if they were much more balanced at first (Think about it when everybody will play with Daken & Ares instead of wolverine & Thor, whatever the new A-team will be).
And change your damned system, recovery and the way you can allow casual players to simply PLAY your game (where they like to, when they like to, with heroes they like to).

The easiest way is always the better, if candy crush have made it, i'm pretty sure you can do it too.