I've been made aware that a lot of the old subclasses could use a buff for PvE. For example, the perks on some the old subclasses really need looked at (i.e. Circle of Life, Life Steal, Juggernaut). Some other issues lie in the mechanics of the subclasses themselves, like Nova Bomb, Fist of Havoc and Arc Blade just not dealing enough damage to be viable anymore. Crucible doesn't seem to be a huge issue, since all of the subclasses have their own strengths and weaknesses. I don't know if Bungie purposely made the new subclasses completely outclass some of the old ones, but regardless it's not fair to those of us whose playstyles are just better suited to them. Drop a comment if you agree or have a suggestion for revamping some of them. This is something Bungie needs to look at, so let them know! :)