>>32287717Still not worth using because of speed creep
Only pokemon that would be worth it are probably Torracat, Magneton, Haunter and Scyther for being faster than their Pre-Evos. Magneton would displace Magnezone in OU since a drawbackless Choice Specs boost might push it over the top. Incineroar is already pointless so Torracat takes over there and vies with Arcanine for team spots in UU.
Haunter sees an uptick by virtue of Levitate, even though it's still slower than its Evo.
I can't think of any other pokemon faster or otherwise better than their Evos, so that may very well be it.