I think the system is spot on. I cannot spam the potion button and rush through a level as I could do in PL. Now I must stick around an engineer, let the tank run in first (Gasp!) and as a tank use all my abilities in a smart manner to keep the attackers down. This is a great thing! This game is all about teamwork!

Another reason why potions should not be made cheaper: I have something to use my credits on now! In PL I had a ton of money that I would never use and just stash it away. Now I have something worthwhile to spend on

So guys, stop complaining about potions and charge into mobs with a team mentality!