If you loved Macross Delta: Passionate Walküre, try Macross Frontier: The False Songstress
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Macross Delta: Passionate Walküre
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Macross Frontier: The False Songstress
What they share
Both films are directed by Shoji Kawamori, and they both carry the uplifting mood tag, and they sit in Animation / Drama / Romance / Science Fiction territory. If that's the register that drew you to Macross Delta: Passionate Walküre, the second film will land in a comparable space — through a different lens.
uplifting
What Macross Frontier: The False Songstress is
It seems someone blended romance and mechs. Alto Saotome and Ranka Lee pursue their dreams amidst a brewing battle. The film's conspiracy plot gets a bit lost in its own noise.