I’ve used H4 a lot. Personally, I simply adore the NE (Note Expression) integration into the newer VST3(.5+) instruments. Another core thing I like is the way that “the tree” was decided to be used as a component structure of the synthesizer is great, easy to view, though maybe for some, a bit difficult to get used to. If you are used to tree views, like a folder/file explorer or maybe in software development, it shouldn’t be difficult to get the hang of it.
And like Cantankerous already pointed out, the GUI in general is very logical in that the layout has been very segmented (too much for some, I’m sure) but as far as I am concerned it’s gold. Not a bunch of filler stuff or waste of space, just functionality UI.
And like C, there are some things that I would like to have in H4, but by no means show stoppers. I would love more sample looping options, granular synthesis (a’la Padshop) functionality, etc. I love when I can do entirely new things, twist things in new ways, not just the same thing I did in the last plug-in I used. New functionality inspire new sounds.
Again, like C… hmmm… I might has well wrote that I agree with C. Well no, I really wanted to assert what he said, and I agree in thinking that you have decided wisely.