More than one countdown and trigger in a timer block
As it stands, a single timer block only allows one countdown and a trigger when that countdown hits zero.
It would be much more logical and space efficient if a single block had many timers inside (even a few would be good) so that you don't have to have vast arrays of them to perform tasks like opening and closing airlocks and triggering sequences with big moving parts.
Essentially, a single timer block can act as many timer blocks. You could name each pair of countdowns and effects and trigger them independently, as if they were separate blocks. They could even be separate in the terminal if that would be neater for having many timers functioning from one block.
I could give or take this on a small grid, but the size of a large grid timer block is very frustrating given that it only has one function.