Keefe isn't wrong.
Holl wasn't the problem in game 4.
Not directing this at you, but name me a single person on the Leafs in game 4 that didn't make a couple bad plays?
The only players on our team that had better +/- than Holl in the game were Kase, Kampf, Brodie and Muzzin. Not that I think +/- is some hugely telling stat, but being just a minus 1 in a 7-3 game is far from horrendous.
Beyond that, he's a big part of the reason the PK was successful 7 for 8, including an extended 5 on 3.
The Rielly/Lyubushkin pairing was the pairing that struggled.