We definitely need to get back the old Thief skills (Hide, Climb, Detect Traps, etc.) In 3.x, all those became available to everyone. This isn't bad, but thieves/rogues need to be a Lot better at them than anyone else.
For combat purposes, I would give the rogue 2 main class features. Backstab/sneak attack should be more in line with how it started originally, and scale more slowly. And all rogues should have a weapon finesse feature that lets them use Dex instead of Str to hit.
For combat purposes, I would give the rogue 2 main class features. Backstab/sneak attack should be more in line with how it started originally, and scale more slowly. And all rogues should have a weapon finesse feature that lets them use Dex instead of Str to hit.