(Author of said bug and ratiotile layout, and battery widget).
Nope, not ideal, but I've been using qtile with multiple monitors for 3+ years now.
Restarting qtile isn't that bad though because you don't lose your windows, just the layout of them. And because I have my most common layout first, it turns out not to bug me.
For me it just feels right, even with its warts. I'm glad Tycho and others are pushing it forward! I miss it everytime I use a mac or other machines. Plus the kids think at my child's elementary school think my computer is "awesome"! :)