Just like he did on the right rifle, come straight up to the top of the chassis, and cut it straight off on both sides, just make it a convertible. Thicken up the carbon in the sides and bottom to make up for the missing support and to stiffen it up. That way you still get full height & length of the handguard & MLOK slots. You might could make it a seamless 2-piece design where you can drop in & slide-lock in the top piece if you want it, similar to the old LWRC M6A1 handguards.
As for tool-less adjustments, I think that would be good thing, but at the same time, once they’re set for me, they’re set, and I don’t move them. The only ones I have to move are the comb on my Solus chassis, because you can’t remove the bolt without moving the cheek piece out of the way. BUT, y’all already addressed this issue on the MPR chassis, with the scalloped cutout, so you don’t have to move it, so it’s not really necessary IMO for the MPR’s.
Adjustable LOP is kind of a non-point, unless you’re letting other people shoot your rifle for more than just a couple shots at the range, just to test it out.
Just my thoughts, but I’m sure others differ.