I just finished an Ovation cruise yesterday and am finding myself wishing I were back on the ship. The shows were good, but they didn't come across as great. The only one that required a reservation was Pixel's Cabaret in Two70. That one was good, and I'd recommend getting there early as the show has a better impact from a lower, centralized location.
The set and costuming for The Beautiful Dream was also solid and very entertaining. I'd recommend a pass on Live, Love, Legs as that show had an overreliance on lighting effects, and it went out of the way to choose music and songs that failed to showcase the talent of the cast. The skimpy costumes for the women in the show could be a draw, but quite frankly the guys stole this show with their supporting work. This is the same cast as Beautiful Dream, so they have the skills, but not the material for that show. There were several comedians and a rock cover band for the other nights, which are likely to change in future sailings.
There were a few seats reserved in the main theater for suite guests, but these were not prime by my standards, and good seats were always available within 15 minutes of show time even with 4500 on board. I believe there were a few reserved seats in Two70 as well, but these may have been on the upper level.
They had a matinee for Love and Marriage one afternoon in the main theater, which was fantastic for those who did do not want to stay up late for it. There were also a stream of game shows in Two70 and music and trivia in the Music Hall and Schooner Bar. All in all, there was plenty of entertainment throughout the cruise.
It could be that we sailed the week after the President's Cruise, but the MDR staff was on top of it. Great service and the food was solid the days we choose to eat there. There were no signs of staffing shortages or shows cancelled.
The downsides that I can note is they seemed to have an issue with the hot water with the temperature going from Lukewarm to scalding the last 2-3 days and no hot water yesterday when we disembarked. In Skagway, we had to tender due to the issue with the rockslide, which resulted in delays getting off and about a 40 minute wait to get back on the ship. I'd recommend booking a ship excursion that day if the dock is still out of commission.
Let me know if you have any specific questions, and I'll try to get back.