"Both words can precede X" themes largely fell by the wayside about three years ago, not long after Will called a moratorium on simpler "words that can precede X" ones. All established theme types go through this life cycle — they start with a bang, grow mature, wane in popularity, feel overdone, and die out. However, it's nice to see a throwback to the past every once in a while.
DOUBLEDAY is as reasonable a rationale as any. While it's not exciting — there are a ton of words that can precede DAY, so there should be an ample number of possible themers — it does the trick. HOLYFIELD = holy day, field day, etc.
I did hitch on VETERANS MEMORIAL — it's no surprise that this is a debut phrase. It Googles well, pointing to dozens of different memorials honoring vets. It's not something I'd strive to use in another crossword as fill, though, since it feels too general of a term. VIETNAM VETERANS MEMORIAL evokes much more vivid and specific imagery, for example.
As a constructor, I often hear the siren song of long across bonuses, particularly where ABILITIES and OUR SAVIOR are today. Usually, you'd have a black square at the S of OUR SAVIOR, but you can sometimes do without it, thus adding in more pizzazz. Why not? Let's do it!
When it forces something rough like XIE XIE crossing XFL and EXO, though … it's not quite a FELONY, but you're usually better off putting that black square back in.
Among crossword makers, variant entries are one of the most hated types of crossword glue. ANTEED looks so horrible, so desperate, that there's no way I'd let it through. It's a tough call, though — it is something solvers can reason out, much less so than XIE XIE. Does it look better or worse than HOBS or GYRE? Hard to say.
I enjoyed reviewing some crossword history today. Although this theme type doesn't (and shouldn't) show up much, an exemplary instance once every few years can be fine.