I'm bundling WP-LESS with a theme I've developing, and so far it works great - many thanks.
My only issue so far is that if I have, say, main.less, which is enqueued, and this @imports vars.less, when I change vars.less the cache doesn't update. I have to make a change to main.less for the cache to update.
I don't see this as a critical issue at the moment, because updates to global includes like vars.less aren't too frequent, but it can be annoying. Are there any plans to update the cache when @imported files are changed?