First of all: good job with all these updates and new features!
I updated to 2.21 yesterday and observed some unusual behaviour. Maybe somebody can comment on this and maybe some of these can actually be controlled by some of the new settings?
1. Alien Abduction - there still was a UFO active, stealing a car. Nonetheless, the skip ramp activated and I could end the mission which of course awarded no saucer light. I am pretty sure that on 1.5 the mission could not be ended before all UFOs either escaped or were destroyed
2. Martian Happy Hour - mission completed by hitting ball catcher, but the ball dropped back on the playfield and drained through the middle. No new ball was automatically issued after the video sequence ended (as was the case in 1.5, to continue the same one that just drained). The pin finally started a ball search and released another ball
3. This new ball should have been the continuation of the drained one, therefor Super Skillshot should not be active now. However, I could do a Super Skillshot when shooting the ball (I failed to check if the pin had wrongly increased the number of played balls -issued a new ball rather than replacing the drained one- or stayed on the current count)