Though it is minor, I'd like to see more High score awards. Currently, there is a Warp champion and Medal Champion. Why not have a Champion for each Level 1 mode? This would be great for locations as more people could enter initials. Walking Dead and GOT have numerous high scoring options, so I think this could work with ST.
I'd also like to further benefits to combos (like Demolition Man), maybe awarding random awards at certain counts. This and a combo Champion.
Add more mystery awards. I have only recieved extra ball and special maybe 4 times over hundreds of games.
Fix the pops score 200K. This doesn't seem to work.
Finally, a way to stack mode and reset mission timer would be cool. Perhaps be able to choose if you want to take GAT or start a new mode to run with current mode.