RPG losing its' radius is no loss in power, bear with me.
If you have a Sharpie in the game, go with the crowd control and radius boost. If you say you cannot because you need siren resistance then you are using a crutch, it's been that way for a while, moreso now with the siren FX sync.
If you do not have a sharpshooter, go for impact damage. Point being you can pick which one if you open your mind to not using previous crutches. For reference, FB is hurting in ways but I can guarantee it has nothing to do with Shrapnel - as I play without shrapnel and know how to. It is not necessary just an easy choice that people have gotten used to.
So you go CC if your team needs it or you go high impact if your team needs it. If you have gone high impact and your team already has it covered, who is to blame? Or you could co-ordinate and possibly get sharpie to go the stun route if you were adamant about keeping that job.
Furthermore stop using RPGs on clots; The HX, regardless of opinion, is stronger now in both trees (ammo being more expensive now though). It's a decent PDW right now I'd say, then again I have a lv25 Demo so I can't speak for it without perk skills.
If you're running around with an RPG-7 you're looking for either tanks to destroy or FPs to destroy. Don't buy an RPG-7 when you're looking to kill groups of soft targets, honestly a 40mm grenade does a much better job at that currently and I personally feel that's the way it should be.
M79 weight should be dropped to 5 though so you can save your RPGs and use more than the HX25 at the end. Same thing has happened to sharpie but the difference is the LAR is an absolute beast at personal protection.
My entire point is if you feel you actually need that radius for an RPG you have a skill to increase it, the choice is yours. Don't wanna leave siren resistance? Fair enough, but that choice is yours and the option is totally there.