It's already got a 3.3.0 available, it is kept sync'd.
I have very occasionally run into a bug or problem with the sass port not being kept properly parallel to the original less, but mostly it just works fine.
Yeah, I have run into that too previously, with "QA" on the Sass port not being as good as one might ideally like.
But, hey, look, they already released 3.3.0.1 of the sass version fixing the problem, 3 hours after the ticket was filed, that's pretty responsive, sometimes that's the most you can ask for.
(Part of the issue is it's not JUST a Sass version, people expect a Sass version that works with Compass with or without Rails, and that works with Rails without Compass, and that works with Sprockets without Rails, and that works standalone with nothing but Sass just compiling css like the Less version, and each context has it's own picadillos).
https://github.com/twbs/bootstrap-sass
It's already got a 3.3.0 available, it is kept sync'd.
I have very occasionally run into a bug or problem with the sass port not being kept properly parallel to the original less, but mostly it just works fine.