Would station camping be a problem?
Outside HS there are stations without CONCORD too and players there know how to deal with station campers. Yes, the Jita undock would be busy, possibly even busier than today, but I don’t see it as a problem for the players.
Players can simply approach the station from different angles, use bookmarks to warp in at unexpected places (the Jita station is massive) and use bookmarks to instantly warp off at the undock.
Even without CONCORD it’s not like the undock could really get camped with bubbles like it can be in the more dangerous parts of space, so at most you’ll have a bunch of people playing station games and shooting the less aware players.
The main downside I see of the abolishment of CONCORD everywhere is that it raises the skill floor of the game.
Without CONCORD it is harder for new players to get into the game. New players can currently learn how to fly their ship, what dscan is, how to target and mine asteroids etc. under the protection of CONCORD deterrence until they’re ready to venture out into the more dangerous parts of the game.
And aside from new players, there also are older players with lower reflexes or less willingness to pay attention who also benefit from having a small place in this universe where they can play without getting disturbed as much as elsewhere in the game.
For that reason I think HS has a place in the game and CONCORD defines HS.
While I’m against abolishment of CONCORD I’m not against making HS smaller. Players don’t need thousands of systems to learn how to mine, how to trade, how to navigate and how to fit their ships.
In fact, I think it’s better for the game if those new players are encouraged to also venture outside HS sooner in their career rather than later.
Splitting HS into four HS islands surrounded by LS would be my preferred way to do that. Not only does this encourage new players to learn early in the game how to cross more dangerous parts of space safely, it also could create four unique disconnected market regions and trade and hauling opportunities for those brave enough to haul through LS.
TL;DR: do not abolish CONCORD, they’re useful for making the game more newbie-friendly.