Mind trick used to last, what was it, 15 seconds at level 3? The current mind trick was a rebalance, it lasts less but also costs way less. It's more versatile, allowing for force powers like speed or push to be used at the risk of going very low, which wasn't possible with the original FP cost of 70.
I like it very much as it is now, it takes skill to use but it's also handy when you know what you're doing. Though I also feel MT level 3 is almost a must for actually using it. I wouldn't be against level 1 and 2 being buffed to last as long as level 3, but with higher FP costs instead.
Not to insult the OP or anything but I feel like we should have some sort of design history for the game at this point because I often see people recommend changes that would revert things back to the way they were, and they were changed to their current state for actual reasons.