With the AI now being able to handle jump tenders, there is no real need anymore for an infinite capacity jump gate anymore.
Similarly, with space stations now having "structural shell" as defining characteristic, any options for deep space construction should apply to all space stations, not just exclusively jump gates.
Jump gate then can be a module, designed and researched as part of the jump drive technology branch, with a few changes:
-Jump drive and gate capacity should stack. This allows to build gates and drives for arbitrarily large ships.
- Gates should be cheaper than drives, but can only be used on space stations. Also, the gate does not need to be large enough to jump itself to be operable.
-Larger drives get a capacity bonus, to incentive building large drives instead of many small ones.
- Drives and Gates are no longer purely commercial or military, instead you can trade off capacity, gaining for example +50/+100% civ capacity while loosing -10/-20% mil capacity. That way you can tweak your tenders and gates, either getting a 10k/10k jump drive, or getting a 30k/6k, or a 50k/2k split in capacity.