Puzzle #410 - Cave (Half and Half)

Recently, djmathman finished running Logic Showcase 31, where the requirement was to make a puzzle using the recently popularish variant "Half and Half". In addition to standard Cave rules, exactly half of the cells in each outlined area must be shaded. I almost didn't submit a puzzle for this but found myself with an hour before the deadline, an idea, and a drive to make something neat.

penpa interface

puzz.link interface (Nanro substituted, not recommended)

I did at one point have a unique puzzle without the dominoes in the corners but felt that the extra pair of regions allowed for an improvement to the logic and flow of the puzzle.