Personally i think its cool, but i can see how some people might get aggravated. Still, it mixes up the games, that and the over the planet or under the planet moves.
This happened in my XL planets mod, but i had increased the grav well sizes 5 or 10 times, the planets were all hills and valleys peaked, which also made it cool, at least for me. I would like to see this as an option though, so we could choose to go slower than lightspeed to pull a fleet out of a grav well and fight in open space. 
I notice this happens too in the regular game when ships are set to aggressive, and in effect chase enemy ships out of the well as they try to escape, other than that, i haven't been able to get my own ships to leave the grav well on purpose. But it seems the chase, and also the jump function, according to whatever angle they try to jump will sometimes push them way out of the well.
Anyway, just some observations and some opinions.
Take care,
-Teal