Lock behind *some* of the older content behind skill trees.

[HellHeater]

For example, wendy always has access to her potions. Sure this is good and what I say here isn't meant to be a nerf but that doesn't make much sense. The potions suck anyway and I think it would be best to improve them and remove them from the base kit. Make them the base skill to unlock go access others or something. 

Same goes to walter. He has had a bunch of different types of rounds that left untouched in the update. It makes more sense to take all ammo types together and put them as seperate skills. This would make it significantly more consistent.