The only claimflags that would need to be left up to the playerbase would just be the enter ones in this case. The teleport out was left under staff jurisdication to avoid trapping as theres no other way to trap people outside of nether portals. All this really does is let the griefers have a hayday and even if folks block there villagers in. Grues and banshees fly thru blocks u can't defend against that. Also if the shark event starts up they have an aoe that hits 3-5 blocks out. Doing anything from killing villagers to knocking off all ur frames, banners, and anything similar.
Yes rlcraft is meant to be hard despite the fact its easy once learned. But, leaving peoples bases open like that just makes it even easier for them to glitch in and cause mischief at least with stopping people from walking in and teleporting in that leaves the person with only bug abuse to enter your claim and it taking alot longer as certain conditions have to be met.
But, if this is ur decision just understand that from experience you have only opened the door to a headache that will never end. Also when did claimrollbacks bring back villagesr? That never worked in the past. We'd rollback the claim and everything but the villagers would come back.