Is this addon supposed to speed up just the starting bots by x factor -- or all bots? Because this is making EVERY bot, even late game, faster by x factor in the settings.

The mod modifies the speed of both logistics and construction bots by a global multiplier defined in the 'Mod Settings' when creating a new game. If the mod is used in an existing save where multiple robot speed increases were already researched, it's bound to make all bots comically fast.

Edit: The default settings of the mod make the bots 6 times faster than the original speed