To be honest as a returning player, Seeing so many PoBs all over the place is quite visually unpleasant, PoBs should be something that defines a faction and gives a faction purpose, something to work towards and build on as a faction, something to fight over and contest.
Having so many PoBs atm and then people just leaving them to decaye in my opinion is a good thing, there should be a limit on how many can be placed in one system, and then people fight over them for the right to claim and use it, have it so siege days are less and only one or two sittings, not over 6 days.
PoBs should be more like a command and conquer style gameplay mechanic, it will give more purpose to PoBs and make for a more engaging content, having it like it is just adds clutter to game and more strain on the server, which is unnecessary.