Update
So, the Linux port is out of beta. Due to hard drive issues I had to do a fresh install of everything, OS, Steam, MnB, and Floris. For giggles I just installed it and started it up, and to my surprise, most (but not all, specifically some skyboxes) of the texture bugs that plagued us before are no longer a problem. However, several new bugs seem to have sprung up. Disabling the special tournaments now sends you to an open field of that region type to fight, and transitions to and from town menus now seems to have a high chance to crash the game entirely, etc. Honestly, I just wish there was a version of the mod that was even more stripped down than Gameplay... I like the character creation, most of the shop tweeks, the landowner/moneylender, and a few other such "Floris specific" mods in the pack... but half of the changes, and almost all of the graphical tinkering I could do without. But every time I open up the DevTools to try and cobble together a stable pack I just get lost.
And even worse, I'm finding out that a lot of the alternatives like Silverstag use the WSE, which just plain won't work in Linux.
*sigh*