IMHO that would benefit high RRs more than low RRs.
I recently tried to solo a bit with my hero. Him being RR7, I got dodged by 3 other solos in a row, who all had speed up while mine had expired.
I imagine the same being the case for low RR stealthers. If they see an lone RR1 melee somewhere, they might want to attack, but stay hidden in face of high RR characters. You would take that away from them.
I don't see high RRs not attacking other high RRs and focussing on low RRs instead.
Considerig all this, I kindly vote no, as I also like knowing my enemies and sometimes even seeking them on phoenix discord and chat a bit