I've played a lot of 4th Edition and what I miss most about the game is the ability to play any party of characters and still work as a combat unit. That is all rogues and still fight well together as we did in 3.5E. Where people could play whatever they wanted and didn't feel pressure to fit a particular cog.
The problem with this then becomes item dependence ie: wands of Cure Light Wounds, which IMO really sucks more than the other. One ting 4E has done (but it takes a few YEARS with a new edition) is have character builds within classes that fit a certain style of party.
Instead of all rogues you may have two rogues, a Swordmage, a Skirmishing Warlord or a Bard and a Psion or Wizard. All can be light-armored and somewhat stealthy while still filling the style of play you want.