I vote against base-building, but we’re already tolerated “base improvement” with Bjornturnet and Ringfort.
It just doesn’t sit right with me - building a base from scratch, when FNIX has means and solutions to trample over most of defencive structures (Hemvarnets and Soviet Intervention Forces and makeshift barricades/fortifications are precedents). The only thing that FNIX couldn’t fully grasp and overpower is persistent guerilla warfare by teenagers (players). Guerilla do have bases, just not so obvious as forts or camps like big burning base in the west Archipelago, but more clandestine like some of remote/isolated safehouses or caverns (command bunkers included).
How these two could stand? Both were helped by players (well duh): hotel first had most machines diverted to noisy town (thanks to commotion created by players) and then one of machine-producing facility nearby had to be shut down, again, due to players messing around.
The Ringfort could stand because of quick actions and daring counter-attack, also again, because players messed around key facility and caused it to “shut-down”, all of which forced to setback FNIX again.
The only reason I see for “base-building” to exist in this game is to draw big target plaques “shoot here” to keep FNIX busy and away from actual base of operations.