I feel his spell got weaker....

He seems like he does fine until the late game where UB, Rook, and Reg dominate.

I think that shatter damage on his deep freez should actually come from fire I say.   Like, if you freeze them and then heat them up again quickly is when they'd shatter, not when you continue to make them cold.  

Make it so if he hits them with a fire-ball, and the above effects are on the enemy, then it does crazy extra damage.    Right now, to me, it still seems to be all ice or all fire (or just ice, because the above shatter combo I think trumps the fire side).   Though the fact that the tech tree merges at the top helps.

In general though, I feel that he's very powerful.   The rook is very much nerfed now that his hammer can't directly target people, so thats fine.   Reg can't really take on multiple people at once, except with his mines.   Reg doesn't have any stuns either, which makes me think that the torch bearer is the guy most likely to take out reg.   If he can get close enough to throw down a frost nova, our winged sniper is screwed. (the rook doesn't care, he's got too much HP, but thats how it should work, right?)

this time you have to aim it though so its balanced
Im guessing you didnt play beta 2D where you would target enemy to use it and it would always hit if you were next to him when he started the animation..

I thought it should be viable to actually switch forms and use each effectively, especially because all the synergy went into the ice tree, whereas the fire tree is just a bunch of damage spells which in fact pale in comparison to all of the ice spells combined. To offset this lack of synergy, his animation for form change should take less time, have fireball buff subsequent casts for 10 secs etc. Also, currently you can switch both forms and gain both effects for a short time if you were awaiting an enemy. If the form change were to be reduced in cast time, this would have to be removed.