Understandable. For the mining speed, I'm not aware of any mod that does this out-of-the-box. As I stated before, in this particular mod, it's going to be tricky due to the "force/team" nature, as opposed to per-player.
However, what it sounds like to me is that you want most things to be very quick to mine, except rails. If I made a mod that allows you to overwrite the mining time for all entities, and allows you to set special cases (such as slower mining time for rails/signals), would that be what you want?
For the movement speed, you can basically do just that with my other mod Adaptive Movement Speed. By default, it'll increase movement speed "on a ramp", where it starts out normally, and speeds up as you're walking for a longer time.
However, if you set base, and maximum speed to 500% (or whatever else you prefer), you'll run really quick, and it comes with a toggle button and keyboard shortcut.