Well, even though I've grown up with TNG era shows and only watched TOS in my twenties, seeing all this new stuff makes me really excited. I really liked Pike, Spock and Una on DSC, not to mention the reimagining of the Enterprise itself, so I'm very much looking forward to seeing them in action again.
I didn't have a problem with the repurposed dyed-in-primary-colors Discovery uniforms they had on DSC, so I don't actually think updating them was necessary, but it's perfectly understandable that a new production would want to stand out. They look good in any case, I love the department-logo stitching on the shoulders, and the lack of a black collar evokes The Cage a bit. Uhura and Chapel were definitely people I've counted on seeing again, the inclusion of M'Benga isn't that surprising either, but having an Aenar (played by a legally blind actor to boot) and an apparent descendant or relative of Khan in the cast caught me off guard. Even though I'm in a definite minority with this, I've always loved when an installment of a franchise was chock-full of internal references and callbacks, small universe be damned. You can start throwing rotten vegetables at me now.
The bottom line is, I'm not usually a huge fan of episodic series, but this looks very, very good for me. I can't wait.