You're right, hard to blame Guerin for all the things that he's tried to fix the problem.
What are Guerin's options?
He's said it's probably better for Kahkonen to spend most of the year in Iowa, which makes sense. I liked what I saw from him, but he wasn't exactly killing it either. Plus he's going to be back up in January once Dubnyk's wife undergoes whatever procedure she has lined up.
He could claim another AHL-caliber goalie (like Comrie) off of waivers. They might be an upgrade but probably won't be a substantial one, and then you've got 3 goalies in Iowa fighting for time (or Robson down to the ECHL).
He could try to spend assets by trading for a goalie, but that brings risks of its own. And with a few exceptions it's hard to see who would be available that'd be worth trading for.
At this point last season Fenton had made the same number of substantial moves that Guerin has: zero. And that was after a full offseason with a mandate to shake things up and a team that was struggling worse than this year's team has for the last two months. When he did finally throw up his hands and make a trade, he brought in Victor Rask. Buffalo has been trying to move one of their 19 defensemen for a middle-6 forward for months now and Edmonton would probably love to do the same. I'd love to see a change in goal, but making a worthwhile trade in the middle of the season does not seem to be all that easy.