If you think you had a rat’s nest, just take a look at mine: https://imgur.com/a/I4N73
That is a very interesting power supply you mention, although I cannot think why you would want 27A on 24V :-).
I just got my printer working arguably perfectly. Although it was after I upgraded to a 24V power supply and duet wifi (used from my old printer). I also put in some capricorn tubing, and put a PT100 (RTD) on the hot end. I could replace the lite6 with a v6 body, but haven’t bothered yet.
As for the structural changes, I was considering doing up a full extrusion cage for the main body with the leadscrews and using linear guides. Although the most significant change I am having done now is replacing the wood with aluminum (having it laser cut to almost the same measurements of the original wood).
I am really liking the idea of the part to align the bed to the main frame. I might print one of those out for my next machine. I also need to do up a mount for my power supply and my box. I really like the way you put the power supply on the side and the box next to it on the “table”. Is it attached to the extrusion at all?
How do you like the bowden? I am wondering why you have kapton on the hot end. I really like the cable bundle going to connectors on the top of the X mount. I was considering doing that when I get the right kind of safe connector.
Are you printing onto aluminum?