Looking good, floor layouts are never easy in reality, paper is always easy, just erase it and move it. A new piece of equipment changes all sometimes.
As to your power, perhaps think about putting a 100 amp box in, you don't have to use it all, and you will not be using it all at the same time with a 1 man show. It's easy to put the wiring in while being built for the bigger box. I hate breaker boxes that are built into the wall, mind you I hate any electrical hidden in the wall/ceiling in a shop, or in a concrete floor! Very time intensive to trace, change or modify!
I am a firm believer in separate circuits for higher draw/bigger equipment unless using a plug in system, though must be close to same amp. draw. And if everything is surface wired, fairly easy to change, add to or otherwise.
Please note, I am not an electrician and am not knowledgeable about the various codes for the providences.
There is a great thing about seeing a well set up "useable" shop with everything in a place, not like my shop, everything is in a place, all over the place!!!
Spell creep is working well for me today.