My own thoughts are that the current jump gates should be highly advanced spoiler tech, or really far down the tech tree, because they do allow significant savings on the logistical costs of running an empire, for a few cheap ships. Maybe rename them to stabilized wormhole to denote that they are permanent .
I would like if jump gates were designed like other stations, perhaps a jump gate module thats 1000 HS and has a 100,000 ton jump rating. Higher tech levels either being lighter or having better jump rating, multiple modules or stations would stack improving maximum jump size.
That basic module is heavier per ton of jump rating than a basic rating 4 commercial jump drive, but offers certain advantages.
Stacking a few modules doesn't require extra very expensive research, like larger standard jump engines would.
Gates allow military traffic as well as commercial (maybe they should have a tenth the tonnage rating for military traffic though)
No jump sickness, fleets are ready immediately after jumping through.
No squadron limit.
Gates could perhaps have a default high squadron radius (maybe double the equivalent level of jump drive tech) when combat jumps are made, but a 0 radius for standard jumps.
Gates are commercial systems, so the station can sit on a jump point much longer than a military jump tender could.
Disadvantages however are:
Gates would be one way, each jump point needs 2 to allow traffic.
But this is a also a good thing, if hostile enemies enter a system you can pull that systems gate back, and the corresponding gate in the other system will still allow unrestricted combat jumps in.
This could easily be argued to give you way too much power over jump points, just tug a gate into position and you can assault the next system without penalty, without the need for micromanaging jump escorts, without fear of stationed defense equipment tearing apart your forces while sensor blinded.
I argue that you should keep an eye on your borders and destroy hostile gate ships before they get deployed, if one is deployed what's stopping you from jumping in and taking it out? They're big and vulnerable unless heavily armoured, and then you're looking at a very costly military ship (assault gates? maintenence for a military ship with a gate should be quite high).
As a potential counter to this I would suggest that if another non friendly gate is on the other side you loose the perfect jump and get normal sensor blindness etc.