I highly doubt that the alien AI uses it. Because the AI is already very complicated, so I don't think anybody wants to implement a variant that depends on a option
I've mostly experimented with the run, and I find it slightly overpowered :
- Exchanging 1 energy for 1 TU ? Any day! The ratio could be 1:2, I would still use it.
- Running is very powerful for your advance scouts : Run a few tiles, wait the 75% remaining TUs. Compared to walking the same distance and waiting, you reduce the risk of getting reaction fire during your turn, and maximize your reaction chances during alien turn.
Still, no matter the balance issue, I'll be very glad to keep it for TFTD with its giant maps...