An annoying thing about Tempered Will's removal component is that it only seems to work on the very specific effects of Bind and Heavy. Disease (like the one in Tam Tara Hard) won't be removed. I also kind of wish it just made you immune to being heavied or bound for the duration, so you could use it to do stuff like move through the Granite Gaoler puddles.

I really don't think there's a good way to fix Holmgang right now other than just removing the movement penalty from it. Like Hallowed Ground, the startup is a little too long to use it as an "Oh Crap!" button. Unfortunately the effect isn't really strong enough that you can plan around using it either, though. Removing the penalty at least makes it safer to experiment with.