I'd have been more impressed if they'd actually made it out of Lego rather than encasing a bunch of bricks in resin.
<pedant> Lego is an irregular plural, even Lego themselves say so 😉 <\pedant>
That's real purty.
I think a dark scratchplate would suit, not necessarily black though that's an easy starting point.
Get some different colour paper cut outs and see what works.
I was going to say, you've got the opportunity to move and reorganise and look at the state of it already
Serious question for a moment, why didn't you go mad fitting shelves and storage whilst it was empty?
Reverse multi scale Flying V 5er with P, J, MM and Thunderbird pickups. V, T and micro switches to control the pickups.
To be honest, I think that would actually be horrible, more nightmare than dream.