https://forums.station.sony.com/ps2/
It seems someone has thought it was a good idea to bring nerfs to vertical thrust for ESF. The above link mentions their new change they have placed on the test server. Now if you enjoy the amazing flight mechanics that PS2 gives to us then please share your thoughts on the proposed changes.
https://forums.station.sony.com/ps2/
http://www.reddit.com/r/Planetside/
These are two post that are actively against these changes taking place on the live server. Please share your opinion as this is something that needs to be discussed and scrutinized greatly.
Edit: I was wanting to try and make a comparison video myself but Sebdollar on ps2 offcial forums did this video. Just gives everyone a visual difference on the PST versus live.