In general we seem to have more hint modes - copy paragraph to clipboard, select text, etc. See https://github.com/tridactyl/tridactyl/blob/5e8f94ff06bd5f14... (and forgive the code ... we really need an argument parser).
Edit: Thanks for Tridactyl, it's a great add-on and truly a life changer, and I just started using it 2 or 3 days ago :)
You can't really write Python well inline (as an oneliner), so custom hints would look a bit different in qutebrowser, as a separate Python extension which would be loaded from a file: https://github.com/qutebrowser/qutebrowser/issues/30
I agree it'd be great to have a bit more flexibility with regards to hinting actions!
tridactyl: https://imgur.com/D1PDBgY
qutebrowser: https://imgur.com/m4vtbk0
Now it's not that a big deal, but the advantages appears clearly on more saturated pages, off the top of my head, stackoverflow's triage:
With qutebrowser[0], if I want to close the modal, `gs` and `hd` are almost on the same place (it's only with experience that I noticed that hints are top left so `hd` is the hint I'm looking for) compare this to tridactyl[1] the `hy` fits very nicely with the highlight which doesn't let any place for ambiguity. I noticed your other answer about the addons, it's very much appreciated, and if I can help with the beta or whatever, let me know, keep up with the great work.