Interesting concept.
A couple things that pop into my head with it. Going with an asymmetrical look is fine, as long as it looks intentionally asymmetrical. I would encourage adding at least a small deltoid plate to your strong side, to help keep that intentional asymmetry look going. Something else to keep in mind is to make sure you don't look too top-heavy.
As far as the tasset armour goes, a lot of us do something similar with a kama(that's the half-skirt looking thing that ARC troopers have). In-universe, they have some beskar reinforcement to them, and they're designed to protect the back of the legs from jetwash, shrapnel, and brush. In real-world practice, most of us tend to just go with fabric ones for comfort and the ability to sit down easier. You could, if you wanted, add small plates to the outside similar to scale plate armour. I wouldn't do solid pieces, since they'll need to flex as you move.
The DC17 Hand Blasters should be fine. They're canon, and Mando'ade generally take whatever weapons strike their fancy, so I don't forsee any problems with them. Crushgaunts are also fine, in fact they do get used in some of the Brigade-level standards.
Overall, your kit falls into the Modern era, so as long as you follow those
CRLs, you should be fine. The two biggest things to strive for are quality and consistency. As long as you have those, I think you'll be fine. I would also recommend keeping your local Ruus'alor in the loop as you build, so that you can successfully get through on your first round of app photos.
