Rocks being better means Sandslash, which already soft-counters them, is more relevant, and that Jolt and especially zap would be less popular. Dugtrio is too frail to deal with anything that might fire back with Stone Edge, and doesn't outspeed aero anyway. Aerodactyl [Stone Edge] vs. Sandslash on a critical hit: 102-120 (28.8 - 33.9%) -- 1% chance to 3HKO Sandslash [Stone Edge] vs. Aerodactyl on a critical hit: 364-428 (100.2 - 117.9%) -- guaranteed OHKO Aerodactyl [Stone Edge] vs. Dugtrio on a critical hit: 165-194 (60.4 - 71%) -- guaranteed 2HKO Dugtrio [Stone Edge] vs. Aerodactyl on a critical hit: 316-372 (87 - 102.4%) -- 17.9% chance to OHKO Should be noted that Golem and especially Rhydon (plus Omastar, Marowak, and Muk) have a low enough speed that 8x crit is still not guaranteed. For me the big hard question is the viability of Kabutops, Gyarados, and Dragonite, which are probably the biggest winners after Aerodactyl. Pretty confident that Onix, Hitmonlee, Omastar, Muk would not get into OU over this, and Tauros becomes more interesting but probably not much better per se. I can sort of see Ubers getting turned on its head, at least in terms of moveset design. Aero and Tauros both get it, but so do Mew and Mewtwo.