Great to see Steinberg to deliver this update so close to the release of v4 or the Max/Win versions.
On quick view things like the jump bar are there (love this one). Also one of the things that were a but and support had promised it would be solved with the new release is indeed fixed (when you use ‘transpose view’ for say a Bb instrument Chord symbols were not shown).

The annotation feature is nice but crude. Not sure why not more line thickness or color options are made available.

One thing i noticed and i am not sure if it is a bug or a feature - other than on my PC (Dorico 4 Elements) in Play mode i cannot select the chord track and assign a VST instrument. Consequently chords will not be played. The normal players seem to work normal