Fireball to become single target spell and insted of that you can make chain lightning so you still have an AOE.

Put a second energy bar with the other player energy so you can see more easaly if the other player is cheating!! and report.
So people don`t complane that mutch.

Maybe remove Mecha Timmy , people have lightning bolt in there decks just for him (at least he has a counter).

NERF Terrance Mephesto he should be a single target and with aoe charge maybe.

The last changes with the legendary cards are not even close to resolving the problem you have with the tiers of cards
i mean that the best cards to have are low energy cost and common wich makes the adventure deck the best since it has 3 of the best cards in there.
Legendary and epic cards should be way way more buffed or there drop rate increased segnificantly.