Give it the TBC mana regen on auto attack functionality, except retool it to be useful. Increase mana costs and damage. Make oomkin gameplay revolve around blasting hard, running oom, then having to choose between running into melee with your plate armor to box with the enemy, or running away to safety to heal and reset.
I like it. Balance is completely gutter at the moment. I wanted to go balance despite lack of pvp potential and lower end of damage but after looking at the actual base damage and coefficients boomkin is absolutely not viable by any stretch of the imagination. Wrath is 36% of vanilla and Starfire is at 70% of vanilla and boomkin in vanilla was actually not allowed to raid due to lack of DPS. Comparing numbers to just spamming frostbolt on a non frozen target, druids would lose pretty significantly even with 500 sp.
Wanted to play druid but not as an NPC, guess I’ll wait for the full release of wow forever in a few months or years when they realize that balance druids and ele shamans are playable characters in the game.