[Mobhack]

All games use some sort of range band based on vehicle speed - e.g. the WRG WW2 and Modern tabletp 1/300 rules used bands of very slow, slow, average, fast and very fast with speed ranges given, which overlapped so you could decide on edge cases.

The game uses a formula to give the relevant MP to vehicles - its in the Mobhack help. The vast majority of users seem completely on board with that. Not very common to have total rewrites of the whole movement system demanded by end users.

If the OP wants to use slower movement then he has Mobhack available and can make his own OOBs to suit his own particular tastes.

He's been told several times before that he can always edit his own OOB set and post it in the mods forum. However, that has never happened - just yet more long posts as if he seems to think we will redesign the game to suit one particular end user's pet notions. Not going to happen.