[5e] Dex Bladelock concept. Thoughts and advice?

So before even knowing the term bladelock (stumbled across it in some forum) I looked at the pact of the blade and thought "Wow, I'd love to play a badass samurai-ish character!"
So far I've planned for level 10, 7 levels into Warlock (archfey, blade) and 3 levels into rogue (swashbuckler), along with human variant because I love feats.
Here's a link to the current PDF because just writing out my current build would be too much text: https://drive.google.com/file/d/0BylWXF62TWXRaEktUTJRYWgwTXM/view?usp=sharing
I rolled 14, 12, 16, 13, 11, 6 for ability scores and amped 11 and 13 up with human variant. I thought that maybe elemental adept feat would be better than sentinel for green flame blade (or booming blade), but then one of them would be much better than the other so it feels like loosing some versatility.
You may have noticed that there's no eldritch blast on that list. While I really like the cantrip, I just don't feel like it would fit my character I have in mind.
Basically he's supposed to have lots of melee attacking options, counters, retreats, surprise attacks and whatnot. Next invocation would probably be otherworldly leap so he can jump around a lot and be even more mobile.
What are your thoughts? Any ideas for improvement?