Takes a whlie, but when you have high sneak skills, and have taken the backstab perk, you can get 15x damage on sneak attacks, which can be doubled with certain gloves. 30x damage is impressive. Then dual-wield.
You can take ALOT down with one hit. If you can get the drop on a dragon (literally in some cases) you can one hit them. or two hit a dragon priest.
Sneaking can be hard in well lit areas and with plenty of opponents around, but that is part of the challenge. You have to adapt your gameplay. Use the silent roll perk to get to shadowy areas, use invisibility potions and muffled boots. Try and distract enemies and pick them off one at a time. It is a very rewarding style of play, I find.
Edit: I have yet to get shadow warrior perk, but I look forward to getting it. You can still escape to a shady area and hide. Sometimes the enemy will lose you.