I like Pakleds the way they are. Just because it's an alternate reality doesn't mean you can go and change the very nature of the species.
I'd like to see what the alternate Federation's relationship with Cardassia and/or Bajor is.
I'd also like to see more Bolians, Betazoids, Andorians, Tellarites, Zakdorn... I'd like to see a Starfleet that demographically represents the Federation, and isn't just a "homo sapiens only club."