One thing I've noticed is if a fleet positions its self just right, it can jump into a system at the edge of the 45 degree angle from the phase lane making it super easy for that fleet to jump into one system right after the other if the phase lanes link into the gravity well like an L. Also this makes it harder to defend a planet with stationary defenses with this huge angle that the incoming fleet has to enter into your system. Why not lessen this angle to be only a 15-25 degree angle?
It just seems to me that the current angle is way too large and makes stationary defense turrets less effective at engaging a fleet on the edges of the gravity well and it makes it much easier for a retreating fleet to get away and cause you to send a fleet after it while you play cat and mouse.
I also think that the gravity wells should be increased in size to allow a bit more room to maneuver.