The thing that seems to have been missed with this discussion of rap and it's relation to the "nuum" is that all the road rap stuff really stems from South as opposed to East, where there has always been more of a rap thing anyway. Yes, there are rappers from East, but it's predominantly a South thing and if you look back to the likes of PDC etc, there's an actual lineage of street rap being a strong thing in Brixton and Peckham etc as opposed to this conceptual view that rap has separated London from the alleged path it should be on.
Really what's happened is that pockets of MCs have jumped on what South's been doing for years. These are the people who would have MC'd on grime and are instead spitting on rap beats in the absence of an active grime scene, which really only exists on twitter now as far as MCs go.
(Obviously the instrumental thing is doing very well, but it's not really "grime" in any traditional sense without loads of sets all over the place and crews of MCs)
As for grime MCs jumping on the rap thing, there are loads of them who used to spit on grime who do the rap thing now- Rugrat, Youngs Teflon (formerly Y.O.), even the likes of Chronik - and you can see that same influence, I think, going across onto the grime MCs who are still allegedly making grime. They're spitting over trap influenced beats far more than they are anything that's doing well on the instrumental side of grime.
But yeah, there are loads of genuinely good MCs and producers on this rap thing- and interesting things happening- but you only really see any vague press for the ones who've been picked up by management and have vague PR backing like Sneakbo or K-Koke, which is a shame I think.
People like Fekky, Blade, Youngs Teflon etc- they've put out genuinely great tapes in the last year I think, but in terms of media coverage etc, no-one's really trying.
Youngs Teflon especially, he's got about eight tapes out now and they're all brilliant- far better ratio than grime mixtapes ever managed bar possibly the Soul Food ones.
Didn't mean to type this much.