Far as I can understand they did away with those bonus effects because they didn't like how people were using them so aggressively, even when not needed, just for stacks. Dunno if any bad situations came up from it, but to them its "better safe than sorry".

What would be nice is if skills we use on the regular already like OP and Tomahawk could gives some gauge. Berserk maybe giving bonus gauge per WS while active would be really nice too.