layer lock is an empty box until you click on it, there is no indication what the box will do. looks idential to the layer-enable box but has a very different meaning.
mask (global) seems to be totally broken. selecting a media, it doesn't show up in the output or preview. works on 2.9
mask (global) has "test" and "test2" entries in the blend mode [since 2.9]
mask (global) says "ink" should say "blend mode" [since 2.9]
mask (global) the "alpha" and "speed" dials are basically invisible because of the new color scheme
bpm (master) says "sinusoid" should say "smooth" like BPM (layer) and everywhere else
slide show (layer) fading knob invisible due to color scheme
in general, the builtin modules are hard to read because of the new color scheme (some parts the contrast is really low, some parts contrast is really high)
feature request
mask global should have modes for "multiply" (use case: you have a mask expressed as white-on-black shape) and a "multiply alpha channel but ignore rgb channels" (use case: file or video with mask expressed as alpha channel, guarantees you don't get weird color effects)
opinion:
I miss the orange color, but maybe I'll get used to it