Is there an option in game to abandon a node? If so, could you tell a newcomer like me what it is.
If there isn't, I believe that is a gameplay feature that the developers should look into when they get the chance.
I bring about this point because I was playing with a friend who had been pushed back to his home node (he was a relatively new player) and I sent a fleet to aid him. We successfully kept him in the game, however, I involuntarily capped the nodes adjacent to his home node. Once the threat was taken care of, my friend was completely bottlenecked and unable to rebuild since he couldn't recap the points to give him further development. And since it was on the ice map, where there is only one route towards the centre, taking nodes beyond was not possible since he wouldn't be gaining the link to his HN (HomeNode).
So perhaps it is also a map fix that is needed, but I believe that the abandon node function could be useful as well.