Like making pistols slightly worthwhile?
It makes sense to me. Flamers get wall of Death, which makes the investment worthwhile even on a slow moving models that might not otherwise get to shoot them. I don't think I'd do both... but it would help to offset a unit's lost CC ability in a turn in which they don't charge, but are themselves charged.
That said, it hurts poor save models like Orks and Nids more than it would hurt Marines, since a handful of bolt pistols firing at Orks would, on average, be just as bad as them charging into bolter armed dudes. In both cases, the poor saves mean that modest AP guns, like Bolt Pistols are even more likely to harm them, making charges more difficult.
I think it makes sense, but it hurts armies that already have a hard time getting their hordes into cc.