I haven’t used a Wacom tablet in ages (and was quite a bad user anyways), but from my personal opinion, I don’t see it being really adapted to Composer usage. I do use a Logitech mouse 99% of the time (laptop trackpad when in “travel mode” 
), and I “couldn’t live” without the previous/next buttons on under my thumb. Not in Composer per say, but more in Windows explorer / my browser.
Having a touchscreen on the laptop / as a desktop monitor helps a lot, not to create the experience, but to test it “quickly” without having to switch to the real Player too often. More info on my setup here.