1) Everything but the dock rescales correctly. This persists even after reboot and only happens in the stock launcher, Nova is OK
2) Several of the stock apps no loger work, and their icons change to generic Androids: calculator, calendar, clockemail, file manager, gallery, messaging, quick remote, tasks, voice command. Any attempt to launch these apps results in a FC. This happens both in the stock launcher and Nova, so I am guessing that they do not rescale correctly at the lower res.
Not a great loss, I would not be using most of these anyway, just curious if there is a workaround. I do not plan on running the monitor at more than 1080x1920. The only thing I will probably miss is the stock email app, I was planning on using that to access office mail via Exchange.
EDIT: Unfortunately it appears that I cannot set up an Exchange account with the lower res, on account of the stock app crashing instantly. This is a complete deal breaker for me, I absolutely need exchange and will need to run at full rez. Bummer, with the bootloader locked I probably can't downfreq the phone either to extend battery life.
EDIT2: You can work around every non-functioning LG app by sideloading the corresponding Kitkat stock app. Unfortunately the one exception to this is Email + Exchange, which is badly broken on stock Kitkat and Google has not bothered to fix it for many months now. For those of us that need Exchange for work this tends to be a deal-breaker issue
EDIT3: As others have noted, Swiftkey does not seem to play well with Nomone either
EDIT4: Nova is also exhbiting some minor issues, with our without Nomone. It does not break too many things, and the things it does break are mostly cosmetic - the icons of the above-mentioned apps turn generic, and the first group of Google apps in the drawer disappeears.