if they add a goalie, which I doubt they will, it will be a cheap option, and not a clear upgrade. First, imo, Gibson and Binnington are not clear upgrades. Neither have played well consistently in years, stats do not lie. Both make more than double what Stu makes, and are locked up fro multiple years after this season. I don't see either as upgrades, and I don't see any way that Edmonton can make a deal for them with the assets it would take to get either of them at 50% retained.
So, are there any clear upgrades out there that are realistically available? Maybe Vegmelka in Utah, but 1 - is he even available - unknown, and 2 - is a clear upgrade - unknown, the guy hasn't played a single NHL playoff game.
All that being said, I agree, Edmonton gambled on Stu and Picks, and right now, it does not look very good. Unfortunately, they will probably be the tandem for this year's playoffs. Try and make the team play better in front of them, and hope they can step their game up (mostly Stu).