I don't think potions should be added, I'll go over it for every potion (neglecting the high prices you choose, since everyone already said that)
- Instant Healing + Regeneration
I know you said splash potions and that the kit is normal. But we already have a kit that gives regeneration for 45s. I am fully aware that this is not the same(in case of the instant healing)! Plus, golden apple are also in the game, they give you two extra hearts and regeneration, so I think this potion is simply not needed.
Although this could be something fun I don't think it fits in an Eggwars game.
This would be a disaster, I think. If someone has a diamond axe and strength, he/she can two hit leather armour in normal and overpowered.(I tested it in singleplayer) Which is too much, you wouldn't be able to defend your egg at all once you died. Now you can try to hit them off once you bought leather armour or buy a sword and combo them to oblivion but if they only have to hit you twice, in your dreams this will work...
And then maybe my biggest complaint of all, campers... camping would be an even better option, just stack up and get pots what are they going to do out pot you? I don't think so, you'll be saying this "
and that's his/hers fifth strength potion" after you said
'"and another notch".
I'm sorry but I'm completely against this, hope you understand
~Fesa