Warpiglet
Adventurer
This is a solid build -- it's actually close to my very first 5e character from the playtest period!
With what you're thinking, you should be able to get by with less than 14 DEX -- putting the points in Wisdom might be an idea to help with saves. (or Intelligence, if you continue with AT, for your spell DC.
I agree with those who are against True Strike -- much better to take two swings, and hope you connect with the first (unless the campaign is going to revolve around surprise assassinations.
Expertise in Athletics is required, and effective.
Absolutely. I will carry two short swords. My musings about true strike and or grappler was relevant for instances when the character is alone and would not get a sneak attack. Early on two swipes would be better. Later, with a nearby ally, two swipes are better. But I was trying g to devise a way to get sneak attacks every other round or better even if alone.