I'd take the time to cable manage. No, you won't see it, but you'll want to do a change at some point and you'll forget what a mess it is and get annoyed that you need to figure out what belongs to what. Easier to just do ahead of time.
Love it
Nobody will see it with the case panel on.
And, if you try to rearrange things, you may well screw things up.
I would not bother unless it offends you.