Eh, I didn't really notice any imbalance. But then again, I wasn't planning on getting Sneak to 100 so fast, or to use archery so much. I wanted to create a melee character who focused on dual wield blades and restoration. So now I've got a sneaky dual-wielding swordmaster who uses her bow for long-ranged offense and restoration for defense.

Anyway, if I'm not careful, I still get noticed when sneaking (e.g. in plain light, near stronger or alert enemies). And I still have to shoot several arrows to bring a leveled falmer down (alright, simple falmer and bandits die after one, but that kinda feels satisfying. Shouldn't waste effort on those weaklings). And well, I only chose the perks which looked realistic aka not over-the-top in my eyes. I stopped at the Muffled movement perk from Sneak, if I sneak over a pressure plate I didn't notice in time, then the game surely shouldn't correct me. Not to mention the Silence and Shadow Warrior perks ...

(you can still perform a silent roll without the perk if you really want to, you simply crouch, jump and hit the sprint button when you touch the ground) Oh yeah, and I like to use the orcish bow instead of ebony or whatever, I just like the design more. Plus I RP with the arrows. ^^
So yeah, still having fun with it. I only got surprised at the speed my Sneak skill was progressing. But I like to listen in on conversations, not alert 'sleeping' draugrs and animals, and/or use surprise attacks.