I'm going to have to be the one to address the elephant in the room as no one else seems to want to.
I've yet to play a game since the 1.1.1 update but from what I have read/heard there are a lot of updates/balancing that I am a big fan of.
However, Acid Cloud has now had its final nail in the coffin with the change that it cannot be placed on the same tile as Prison. I'm not one to have a rant normally but to see my original, favourite spell have it's ONE advantage taken away is upsetting.
Back in the day, I was heavy user of Acid Cloud, it was my signature move. As the skill level rised, I clung to it trying to desperately prove its usefulness but was quickly shown it was far too mana-expensive to be of any real use. The one silver lining would be the hope that the opponent could be trapped and gassed at the same time. As I improved myself I quickly realised that a good player would not be harmed by this combo anyway and I eventually had to get rid of Acid Cloud in my arsenal.
To see it be nerfed completely is sad.
TL;DR Acid Cloud is realistically now just a 4 damage spell for half of your mana. This is insane and should be the next spell to have some drastic changes made to it.