Well, we first see andorians in Journey to Babel in TOS. They also appeared in some ST movies.
Enterprise had a very big chance, which unfortunately they blew it. They could've used the show for first contact with various known races, like Bolians, Trill, Betazed or Zakdorn. Instead they decided on Xindi, Suliban or Klingons.
Andorian, Telerites and even Yridians were a nice touch, though. They certainly took their time on designing Andorians as a race.