There have been several different suggestions as to changes to the jump gate mechanic. Most of these involve a means of closing a jump gate, so as to avoid giving a means of invasion. The most recent is here
http://aurora2.pentarch.org/index.php/topic,3269.0.html.
I'm trying to find out what various people think about this topic. There have been different suggestions about how to close a jump gate, ranging from weapons to construction ships. The construction ships seems the most common, and it's the view I hold, with disassembly probably taking about 1/2 to 1/3 the time of assembly.
Also, some people have suggested closing jump points. I'm not sure that's a good idea. However, there is an idea I'd like to propose: interdiction. A JP interdictor is a device that, when emplaced at a jump point (a fairly long process), affects any squadron transits, either inbound or duplex. It could either delay emergence while giving the defender notice of the arrival, reduce squadron size, or (my favored solution) reduce the jump distance. These would make the defender's job easier, but (particularly if it required specialized ships and a lot of time) it wouldn't be a huge tactical advantage. Plus, if it's duplex, you'll also hinder your own attacks.
