Can fighters launch immediately upon entry into a new system or does the ship have to wait until the jump effects have resolved?
I think so. I don't remember coding anything to stop them doing that, although they would suffer the same problems as the mothership in terms of weapon and sensor delays.
The reason for crash launching it to insert a fighting force. It also gives any defender a lot more targets to have to deal with.
I see two types of JP assaults with fighters:
If you have time, build a jump gate and then send in all of the fighters with an armored, shielded sensor platform.
If you don't have the time, send in squads of jump carrier with two carriers, with a short squad that has one or two armored sensors platforms.
I'm also thinking of mobile air bases instead of ships. These could be towed when speed is needed but would be just mobile enough to transit with the jump carrier.
Another question: can you ship crated fighters as cargo (as you could in SF) or do you need carriers to resupply your assault fleet?