I think people underappreciate Ben. He wasn't hired as a senior editor, like Dan was, and nor did he come in with Dan's level of experience. It was doubtful he was ever going to shake things up. Abby is wonderful partly because she's given the space to be at GBEast. If you simply threw her Westside, I doubt that she'd make a massive difference by herself.
That said, he's made a positive difference overall. Both in terms of GBWest content, and in terms of the overall vibe at Giant Bomb. Between the recent PAX panel, DNB, the Persona 5 spoilercast with Alex, PUBG, etc., he's also been good in cross-coast stuff.
I think what GBWest is missing is...I don't know, some connective tissue? Like, when Dan and Drew were there, they didn't just add the quality of their personalities, but also lifted up the crew's collective chemistry. Dan annoying almost everyone with his bad Monster Hunter opinions was a gift, for example. The main problem over there is that the guys don't seem especially enthusiastic engaging with each other anymore. It was never fair to expect a single hire to fix that.