I get ripped to shreds when I try to get in a toe-to-toe fight with my thief. That's probably because most of his perks are focused in sneak though.
I did get in a fight where I was actually able to pull out a mace and an axe, and did a LOT more damage than with my daggers.
That's the thing.  I'm somewhere in between.  Most of my points are in sneak too.  But I am trying to fight toe to toe.  I've been trying to get certain skills up to help though.  It's a hard balance to find.  I'm around riften and have explored a lot of the map.  But i'm about halfway through the story.  I'm just getting into scale armor.  IT's a lot of work.
One handed and Sneak and light armor are my main atts.
But you need points in bows, enchanting and smithing too.
Especially considering I wasted a couple points early on this char not knowing what I was doing.