It would be nice but there is a lot of work involved to do that and I have been concentrating on getting core code stabilised. Add in to this that it would mean all the existing plugins would not have UI preferences pages until they are updated. I am thinking perhaps of forking the gtk2 code and having a separate gtk3 ui to ease the transition for users. The final hurdle is that all the code will have to be updated to Python 3.
The develop ppa has the latest libtorrent code, the ppa package version requires manually updating the version but it is the latest 1.1.x code.
I am working on Python 3 but I can't give any estimate as I don't know how much more work is involved, it is still not close to passing unit tests. I had hoped for the end of April but I've had a few personal setbacks in recent months which reduces how much coding I can accomplish.