We know that new mobile apps for creating the new synth types are on their way, but also bear in mind that the web UI needs to be usable across phones (which may have smaller screens than your 1520), tablets, laptops, desktops, and HDTVs.
Some responsive web design with different screen sizes displaying more or less of a particular element should certainly come into play at some point.
I will say that I would also like to see some variety in layout between different pages.
The long horizontal list of circular thumbnails works, certainly, and works across different sized screens too.
Having said that, I would appreciate the Explore pages, Home page, Profile page, etc. being visually distinguishable from each other and more geared to their specific task (which is what you're saying too, if I'm reading you correctly).
I'd love to hear more of what you had in mind.