Two and a half years ago, I watched a bunch of Macross shows (Plus, Seven, Zero, Frontier). Macross Delta came out shortly thereafter, which was the whole reason I'd watched the earlier ones, but I didn't have any way to (legally) see it and eventually I kind of forgot about it. Well, a friend finally got the series recently and I was able to watch it.
The first thing you noticed in Macross Delta is the two significant differences from other Macross series. Number one: Someone writing this series really likes the magical girl genre. There's a group of young women named Walküre that performs songs to combat enemies (this is standard Macross), who change outfits during songs and dance around the battlefield with some kind of rocket-dresses (this is definitely new). Think of the "magic" part as being singing and combat dancing, and this is pure magical girl style anime. Number two: The enemy sings too, and uses it as a mind control device. In prior series, the "magic" singing has always been the province of the good guys, using it to disrupt the enemy. Occasionally an enemy might convert a singer to their side (as in Frontier) but mostly it belongs firmly on the side of the hero(ine)s. This time, the enemies are on the offensive with their songs and our heroines are largely on the defensive.
The major differences end there, and the similarities to other Macross series are legion. Young "play by my own rules" pilot gets co-opted into military organization, check. Pair of ace pilots on each side meeting in battle after battle, check. Love triangle with singer girl and military girl after hotshot pilot, check. Giant transforming battleship with aircraft carrier arms, check. Three female bridge crew and a gruff old captain, check. Refugees in space fleeing from enemy assault, check. And so on and so forth.
I enjoyed the development of the enemies from Windermere, which are revealed very early on after just a few episodes. It seemed to me that the writers put quite a bit more effort into humanizing this enemy than in most of the earlier series. We see the events that shaped the Windermere leadership's aggression as the series progresses, and time is spent to develop characters for several of the Windermere fighters. It reminded me a lot of the way that the original SDF Macross series handled the Zentradi.
Other character development was all right, but nothing special. I'd have liked to see more interaction between Windermere fighters and the Delta squad, which didn't really happen until very late in the series. Mikumo's fate was telegraphed so much that it seemed anticlimactic at the end. And the reveal of the identity of "Lady M" was wasted, in my opinion, coming as it did as an offhand comment in one of the final episodes. Surely they could have milked that for a scene or two!
I kept watching Macross Delta in the hope that there would be some kind of interesting twist that set it apart from what one would expect in a Macross series. But that never really materialized. Those two major differences that I pointed out at the beginning are great, but they're also just about the end of the deviations from standard Macross. By the time the final episode rolls around, it's not hard to predict how true love will save the day from some terrible fate. Which is fine and all, but so predictable that it feels a bit disappointing.