One way to give us some control over speed ups could be to let us buy time with coins. Let’s say one hour for 20mio coins. It sounds incredibly expensive but it must be a challenge for experienced players too. This would be almost useless for new players but at least they would know that they can use it some day.
A one hour discount could then be used everywhere where timer are applied to reduce the remaining time of one certain active timer.
To get one day we would have to spend 480mio coins which is even for an experienced player a challenging amount.
That could be a way to give coins a new purpose besides food production (no problem for experienced players) and buying mods (I don’t want to possess thousands of mods some day).
And it would be a new strategic element too, since there are so many items in the game with timers.
Just a guess.