The first thing Holinka did was "fix" to Unholy Frenzy from being by accident physical damage to nothing instead of making enrage again, in a season where DK's were shit and Mages, Hunters and warriors dominated scenery. This was an awful start and rush decision, not sure how senior PVP dev pushed this through.
Some of of his action however later on were good some bad. At the end i don't think he's better or worse than Ghowstcrawler..This game is just his job and not passion probably same as Ghostcrawler's. If he would actually played at high level but he doesn't, and most of the times they hardly listen to anyone who actually understand PVP more than they do.