Pretty much that exactly.
You can always improve a good layout with code/rules/lighting etc. but you can't improve much if you have a poor layout from the start.
EVERY single game I can think of, when lock is lit the insert or lamp is green (the same way extra ball is usually orange) this isn't the case on TMNT (that I could see) and was often surprised when the ball locked or a mb started. That's an easy update that could be applied through code alone with RGB LEDs in place.
Currently spelling LAIR lights training - once you've trained 3 times (to lv4) that's it - no further progress - no big reward - nothing, other than I believe it's a requirement for main wizard mode. I'd suggest that once you've upgraded your initial turtle to LV 4 your perks are locked in and you then change turtle to train them up to LV 4 as well, once all 4 turtles are fully trained you get some kind of mini wizard mode.
Modes/episodes are just poor at the moment, there definitely is room for improvement there.
Maybe I'm spoiled by owning 2 Elwin games, but this seems very shallow and I doubt it would last long if I were to buy one.