As cube enthusiast, I played a ton of cube games, and so I'm very happy I get to play this on Arena, love it!
But Cube is a complicated format.

However, the interface isn't as quick as I want it to. For example, I recently played Breach + LED + Brain Freeze and I ran out of time to perform the actions to win in time in one turn.

Perhaps the game could add more fuses or an increased rope timer for cube events only.
Maybe even something like: as long as you click a ‘Thinking’ button, you get more rope time for N number of times per turn because the turn in which you win the game, may take a longer time than what is available now.
One thing to add: you get additional fuses for each turn you complete fast. However, in cube, games don't always have a lot of turns and they take longer. Perhaps you could play with those parameters instead?