(hopefully) reviving this discussion, as I would also like to see this get implemented, as adjusting the control.lua myself isn't feasible, since I like to run this mod on servers, where every user would have to adjust it by themselves.
Implementing it should only require a few lines in settings.lua (add a map setting of type integer) and a few small changes in control.lua, that is, just using the added setting in whatever place was a fixed number for it before. also, adding a localization for it.