Unless your entire arena has Baze/Shore running he's obviously still useful. There's always somebody still running droids or an amped up 5 attacker squad. And I'm going to doubt very highly that there are only Baze/Shore running in the top 10 of any shard because some of the best ways to beat Baze/Shore teams is to overstack with 5 attackers. Raid Han was never that great of a character for defense anyway since the AI picks targets pretty randomly.
Worth noting too that QGJ zeta lead likely cancels out Raid Han's special.