User blog comment:Mich, Michele & Kuhla/Future Units Preview/@comment-49.144.198.68-20160114084914/@comment-96.4.165.157-20160114173132

Gravion doesn't fill his BB or SBB to max. He justs gets a massive fill rate boost (which can be overridden by anyone else's in the squad). If his cost wasn't so high, he would be excellent.