Uhm current gren do get reduced received acc, late game wipe is more due to AI clumping to explosives, which received acc do jack against. There should be a dispersed command to all squad so this crap doesn't happen too much.
I know RA doesn't effect squad spacing its more to help them compete against allied infantry because right now they get stomped without upgrades and with they get a huge dps buff but the survivability is the main issue not the dps, especially since they cost more to reinforce than all other baseline inf.