Sure, add the glad mount to RSS and make it 100 rounds won while being over 3k rated…because with the ridiculous MMR inflation in RSS that’s relatively close to the equivalent 2400 in 3s. We genuinely might see some players hit 4k rated in RSS before this season ends, which is absurd.
Blizzard is also aware of how deflated the current 3v3 ladder is planning on injecting artificial mmr every week as stated in this blue post
Players that should get the gladiator mount for this season will have earned it by the time the end of the season rolls around.