Not sure if this is related or not, but I have also been experiencing bad video lag, and it came with Season 7. I'm using a Radeon 5770 on Windows 7 64.

It seems to be related with 'draw in'. I'm fine if I stand still in the game, but as I move around a map (particularly ground maps), the image freezes up every time new characters pop into the screen.

I've tried everything from adjusting every in game setting I can, reinstalling STO, rolling back/updating drivers, disabling background applications etc. with no success.

Other games play flawlessly, so I know it's not my hardware. I missed out on the breen ship due to this, and I'm hoping I won't miss out on the 3 year anniversary as well.