I've also recently returned to the wonderful world of Lego Technics, and I recognise much of what you said in your first post.
During the autumn last year I got the Supercar, 8070, and I was impressed with what you can do with these new parts. But at the same time I felt like such a newbie. Last time I got a new Technics set was somewhere around '85 or '86, quite a few years ago :)
I agree on the colours, grey and black are hard to tell apart from each other. I think black was more black in the old instructions (like the 8860). And I wouldn't mind at all if all axles were the same colour. After 25+ years in The Dark Ages, I still had no problem picking out an 8L, 10L or a 12L axle just by sight. Besides, on every page in the new instructions where you have an axle or a beam they also print a comparison picture. Back then they only had one picture for the axles, on the front page :)
I really love building these new models, but so far I haven't really gotten around to making my own models. It's a new way of thinking that I have to get used to. But I've got plenty of practice ahead of me, so far I've also purchased 8043, 8110, 8258, 9394, 9396, 9398 and 42007. Many hours of wonderful building ahead of me :D
Oh btw, it wasn't a Technics set that brought me out of the Dark Ages. It was a ... VW :) I highly recommend the 10220 set, so much fun building and a wonderful piece to put on a shelf somewhere.
The 9396 that you're building was my second set of the 'new' Technics age, and it was a really fun but also frustrating build. I managed to flip an axle and a cog for the rotor. Took me half an hour to fix without having to take apart the whole thing :)
Good luck, and keep building!