Unfortunately there's no great way to route these RD loops (or even chainstay RD loops IMO) without making it bend more than I'm happy with. Yours looks fine, could be a bit longer. One one setup like this I zip-tied the housing to the seatstay about an inch away from the cable stop to make it enter straight and not flop around.

The rolley thing looks nice, but I feel like if I got one I'd have to put one on all my bikes

And I agree it's not aesthetic. It's critical to the function of the RD.