I'm not too fussed with it either myself. It feels like my ships are now model-t fords with eccentric turn-on-a-dime turning circles, but it still takes them a while to speed up and slow down. Would be nice if it were a configuration option to disable it really.
It also rather dramatically effects gameplay since my ships have started taking even more of a pounding around the wormhole defenses. Lightning missiles seem to be one of the more obvious ones that's causing me this problem. But I also had issues with scouting and such as well.
Other random notes:
Acceleration feels really too slow. I don't mind a little, like everything accelerates for the first half second or second it starts moving like other games, but the current implementation it just seems to take ages to change. It's especially noticeable if you're trying to micromanage fighters. Autocannon minipods look particularly ridiculous for instance.
Lightning missiles decelerate elegantly before bumping their nose against the target, then exploding. It probably shouldn't work like this.
The way it works feels "right" for big things like starships and so on, but it seems really out of place for really nippy ships like the fighter class ships with high speed should be.
Things to try:
Melee class ships. I think the problem I reported in the bugs forum about fighters and starships probably relates to this slowing, etc, but I haven't had a chance to test things like the Cutlasses and the like.