I don't think it was necessary for Kendrick to do anything more after the Control verse. That was a ridiculous atom bomb in itself. N!gga had Phil Jackson even weigh in, SportsCenter touched on it.

Then he followed it up with the BET Cypher (Jay Rock's verse btw

), then the sharing bars like a two man cell line on King Kunta which really could have been about anyone, but in hindsight he probably was talking about Aubster.
Regardless, who's generally respected and accepted as this generation's best rapper? It's Kendrick and that's not really up for debate. I get the feeling his peers generally accept the fact that they're not rappin like that. There's a reason why nobody really attempted to go at his head too as the return fire would have been fatal.
That said, Kendrick is so far beyond the rest that, at this point he's Floyd Mayweather, and Meek going at Drake is like Tim Bradley going at Adrien Broner. Lamar would be going backwards to battle any of these 2nd tier rappers at this point. Let them fight for the scraps. And before anybody comes with how many units Drake pushed, and his popularity, etc., gotta remind you that units don't necessarily equal respect from your peers. Truth be told, Aubrey would trade his success for Kendrick Lamar's reputation and respect any day.