What are your plans for lumber storage?

Personally I would swap out where you have the miter saw and planer in the bottom drawing. (I'm assuming the yellow bit is the planer) currently you have the planet along the longest wall, I'd prefer to have the chop saw along the longest wall. Of course that's irrelevant if the space is big enough. It's late here but I don't remember seeing any dimensions. I'd want at least 12' for my miter saw. Longer if possible. You seldom plane or joint full length boards, but you'll almost always chop them down.

If this is your first shop my best advice is to keep as much flexibility in the design as possible. Even with all the expert (not me) advise you'll get here you will still inevitably find something that will work better than what you did first. Incorporating future changes into your design is one of the most important and challenging aspect of shop design in my opinion.