Maybe it would be beneficial for GREE to make a test/BETA world?
A world were they implement proposed changes to the game along with an explanation or reasoning behind the changes, and additionally a forum page where we could give feedback on the beta world features.
This would help them get a better idea of how the players will handle the changes (as opposed to implementing a 12 hour cooldown on teleports and then immediately changing it).

Giving a reason behind changes will help the players better understand the direction that you want this game to go...Just eliminating fuel boosts without an explanation is a bad idea...however if you say "Hey, we wanna test something out...Lets try removing fuel boosts for a few weeks and see how players adapt to this change. We are doing this just to see how it will balance out the game.". It lets us know what you had in mind and we will be more receptive of the changes.