I switched to the multiple AR's on the Lone Star build and it worked great. I used an LVOA-C with Unforgiving, Predatory and Intense and a SOCOM SCAR-L with destructive, ferocious and sustained. It was almost like having an AB build, no issues with ammo either. I will probably roll off intense, during an entire Lexi challenging run it did not proc once. The ROF on the SCAR is a little too low for my liking, I might get rid of the extended mag and get a heavy magazine spring for 10.3% ROF. You don't really need an extended mag for LS, switch out as often as you like. I just roll my finger across the mouse centre wheel and my weapons are changed!
I also tried a FAMAS but it is way too unstable for long term use.
On another note, I've been looking at some gameplay from the new Mass Effect coming out next month, the gear interface and skill tree makes the Division look very pedestrian. I've never played a ME game but it looks quite interesting.
Cheers,