This is a great series, a lot of these teams really should look at diversifying the leagues' colour palettes. I think my favourites have got to be the Twins in Wild colours and the Rangers in old Stars colours, so maybe I'm just a sucker for green and gold.
I really wish the Marlins would have gone with something like your Vice set; that's what I was expecting out of their most recent redesign. The Dolphins colours you've shown above would make for some nice city synergy too; Marlins teal just makes sense.
Cleveland looks good in Cavs colours, but I think the Browns colours are even better.
I never would have thought of volt green for Atlanta, but I actually really like it! I wasn't a fan for the Hawks, but you've made it really pop on those uniforms.
The Mighty Ducks colours are really fun for the Angels; definitely more exciting than red and navy! I love that you brought back the lower-case 'a' logos for Anaheim and Atlanta both. I don't like the new Ducks uniforms in orange/gold/black, but I think they would look better applied to a baseball uniform. Then again, the Angels should probably avoid looking like the Giants.
Growing up as a hockey fan in the early 2000s blue/gold/black was the first colour scheme to come to mind when I thought of Washington sports, so it's nice to see it applied to the Nats too! The blue top with the DC logo is excellent.
I've been thinking for a while that the Red Sox should trade in navy for green, so I'm a fan of that one too, though in practice I would look for a darker shade than the Celtics use.
Some others that I think would be cool to see if you're up for it: Dodgers in late '90s Kings colours (especially in light of the revelation they almost switched to purple), or the Mariners in the modern Seahawks navy/grey/lime.