that piece on road rap is confused. none of the guys in the video are 'relative unknowns' - if anything they're relatively well known (relative to how well known anyone in uk rap is)
it's not grime, and the constant attempt to draw links between the two genres is a failed conceit. most grime mcs made more hip hop tunes than they did grime, it was a radio genre. then when it went off the radio, rap emerged as the sole outlet. grime disappeared, 'road' rap didn't appear. "road rap is absorbing grime’s road energy into hip-hop’s traditions" nah grime absorbed hip hops street element. i.e. it's not a part of the any continuum other than british youth having liked hip hop for two decades now. it's not rave music.
the suggestions at the end are poor.
you don't seem to have a real interest in the genre other than a tangential desire to link it to a wider theory/make it somewhat derivative of genres you do like. shouldn't have written about it.