It does have uTorrent support, see image.
The uTorrent option in the P2P shield is unchecked by design because of the way utorrent works.
This is by design. Basically, µTorrent scanning in avast is suboptimal and we decided to turn it off by default (this applies to both Normal and High sensitivity levels). To be more specific, if µTorrent scanning is on, and you're using uTorrent to download large files, ashServ.exe will hog your CPU. This is because uTorrent closes/reopens the target file after transmitting every chunk, forcing avast to keep rescanning it periodically.
There is no roadmap for 4.9 to follow 4.8 it could just as easilly go to 5.0, personally I don't even worry about stuff like this, I will take whatever program update follows, be that 4.8 and later builds, 4.9 or 5.0.
It has been stated that avast wont use heuristics as such but with improve the existing generic signature detections, but 5.0 is likely to have a behaviour style element.