I have L generic L brackets for the gh3's and the scarlet, but rarely use them vertically and only for stills.
I've done some vertical videos but have had no commercial use for them, just as an experiment because every electronic canvas is horizontal.
It seems for most "videos" we're pretty much stuck at 16x9 which I think is not the best canvas and would much rather shoot something around 2 to 1, but it won't mix with past footage well.
I also much rather shoot 30 progressive rather than 24, because when you have video for computer play, traveling graphics, pans are much smoother at 30 than 24. 24 is fine for broadcast monitors because they change everything anyway, but for computer play, I've never seen any positive reason to shoot 24, though most "traditionalists" just go nuts at the mention of anything but 24.
It's funny, I've heard such an uproar of the Hobbit being 48fps, though I've seen trailers in theaters and it's beautiful, though very highly effected in post, still very very pretty footage.
Never once thought hmm, maybe thee should have worked in 24fps.