While I cannot comment on interface issues for GMs, the VTT interface for players seems mostly unchanged (thank god for small mercies). However, I'm not entirely sure about that, since we only used the opening map landing page, and since our GM, and the other players and I just couldn't look at the site for our latest game, we just went full TotM, excepting for that one uploaded map screen. Not everyone likes or enjoys this kind of bright eye-candy. It personally hurts me to look at it, and I try not to. Colour psychology is not universal, and s omeone needs to study up on colour preferences. I can't find it right now, but I know there is a matrix out there for how people with certain colour preferences can't stand opposing colours, like dark colours (black, navy blue, etc) are mostly disliked by people who really enjoy lime green or neon pink and vice versa, and people who like pastels tolerate both those options but do not particularly like either. You also need to consider people with light sensitivity - truly bright colours can be physically painful and blur vision; that's what Dark mode should be for, but everyone I know who uses roll20 (across 4 campaigns) hates Dark Mode and refuses to use it. They'll even take this abhorrent pink assault over using Dark Mode. I haven't tried it as a result of all that negativity, which is a shame, because I don't handle so much white very well.