In Diablo II health potions have a delay, restoration potions do not (or did they change that in LOD?). I started a new character in LOD some time ago after not playing for awhile. I just about got myself killed because I was used to just using restoration potions, and wasn't taking the delay into account the first time I used a health potion.
Hmm it has been a while but I don't remember you may be right.
Though I have to say one of these two would be nice
1. Make the delay like diablo or
2. Or it restores health instantly but after you drank a potion(any) for 3 seconds you can not take any action but just move how about this? I mean make potions a little less powerful with no delay and instant heal and the alchemy skill potions rather become too powerful