Both good and bad being able to have connection that you control the flow of to another wormhole, example a C5 being able to have a permanent connection to a C2 with a HS static, great for the C5 folks but very dangerous for the C2 pilots who can be pushed out of there hole. This would also allow a presumably powerful C5 group has access to all the content would they want and a connection to HS.
This could start quite a few wars in wormhole space (can be viewed as a good or bad thing) and start the formation of large worm hole alliances. This could allow some good things to happen such as a bigger alliance could get people to start in a low class holes and then move them into the higher class hole easily, lessing the learning curve for some wormhole groups.
If it is just a one to one connection, as in only from A to B and B to A, then things are less scary , but if you can do from A to B, B to C, C to A then thing get scary fast as large corps can quickly push out there neighbors and take over large areas. Wormhole Capital movement could finally be a thing in low class wormholes, which sounds bad for any defenders.
Everyone would have to put up a gate in order to keep there hole safe from invaders at all times and would add and extra expense to keeping your hole safe. An Alliance with another hole would almost be a necessity in order to keep each other safe ( the ideal of wormhole couples is kinda cute, but would totally be a thing).