Does anyone else feel that Mr. Mime is a potential OU threat?

Mr. Mime @ Expert Belt
Ability: Technician
EVs: 252 Spd / 252 SAtk / 4 HP
Timid Nature
- Hidden Power [Fairy]
- Charge Beam
- Magical Leaf
- Psychic

A rage quit:
http://pokemonshowdown.com/replay/generation55-56377773

It can also 2HKO Latias after one Charge Beam.