"Both words can precede X" type theme today. Will spaces these out since they've become a bit overused, but today's has a neat ...
read more"Both words can precede X" type theme today. Will spaces these out since they've become a bit overused, but today's has a neat revealer helping to set it apart. POWER COUPLE is a great phrase in itself, and it perfectly describes the idea: SUPER power, STAR power, FULL power, STEAM power, etc.
Nice themers, too. MUSCLEMAN is a colorful, fun one — a few months ago I attended a muscle-building contest with friends (one of their employees was competing) and had a lot of fun. (A point of advice: at one of these events, it's not a good idea to walk around with your arms out, flexing your neck in mock poses.) SUPERSTAR and HIGH HORSE are both solid, too. FULL STEAM, though … it's like playing the penultimate chord, leaving out the resolution. Or saying "Shave and a haircut," just daring someone not to yell "two bits!"
AHEAD! Ahem.
I like that Jacob's layout gives the solver no across answers longer than the themers — hard to confuse theme/fill that way. And I bet there were so few choices in themers that Jacob was just glad to get something to work. I've made these types of puzzles in the past, always starting with a giant list of individual words before running through the (huge number of) pairs, insanely happy when something made sense.

Check out 31D: UNCAS. What else are you going to put into a U?C?S slot? "Jacob should have swapped the themers around to get a more flexible start to the puzzle," you might smugly say. But wait — what would you have swapped? Oddly enough, three of the four themers have U as their second letter … and those same three all have A as their penultimate letter! Not a lot of options. UNCAS I think is a fine answer, as it's straight out of history and literature, but perhaps crossing it with non-proper nouns (NIN and LOA) would have been better.
The NW and SE corners perfectly illustrate the constructors' constant trade-offs. Clean NW, but without much sizzle. Sparkly SE — CLAM UP / KIGALI / SPANKS is a great triple — but with ESE, EPIS, and a tough AGA / KIGALI crossing. There's hardly ever a perfect solution. Ah, the eternal struggle.