Non-labeled wormholes would be more exciting, but it could potentially get pretty damn frustrating if you get lost. Personally I think that's a good thing; you fly through completely uncharted Nexus space, you get lost. It happens. A newb might not agree with me, though, when he gets shoved out in the middle of greyspace because he went through the wrong wormhole.

Perhaps seeing the extra wormholes inside the ion storm at all should require a special type of storm radar (Ineubis and XX both have their own storm radars, just add the "nexus wh detection" ability to these). This way you could have non-labeled wormholes for more excitement and adventure, without exposing them to people who are just stumbling through.