Let's just start with some basics...
How about they fix what they got:
Let's see... this is kinda like following the yellow brick road to Oz...
Main items, I have 2.
Give the Mini-14 consistant and repeatable ACCURACY.
Give the DA Revolvers (and your autos) smooth and light TRIGGERS.
Elective items, I have 2.
Give the Auto Pistols some little brothers.
Pistol caliber carbines that use pistol mags.
Calibers 9, .357Sig, 40, 10MM, .45ACP and capable of .45 SMC/SUPER.
That is all.