It is not a good mechanic for the current experience of the game, considering all the things people like to do in it.
This raid buff should become exclusive either to a new difficulty mode, or a world option.
But imposing it on everyone else for some silly cliche survival gameplay experience that a cynical minority want in the game? at this point I'm considering finding a different sandbox game for myself and friends I play with to go on, just in case in the future development of this game Mojang actually does force something like this on the rest of us.
we would have no way of preventing castles or mansions being dismantled because by the time the raid mobs were noticed, blocks would have already been removed if the raids received this kind of a buff in an update.
Ultimately it's not really a challenge, just an annoyance.
There's a difference between threats to players, and threats to builds.
and as I said before not everyone plays the game for griefing, even survival players who like having monsters to fight don't generally want to put up with having their towns trashed all the time. If they wanted that kind of experience they'd be playing on an anarchy server, but they clearly don't. Just because griefers are upset that they cannot join private worlds wise players set up doesn't give them the right to then demand Mojang to make AI do the job for them.
Oh it definitely wouldn't work in normal gameplay, no shot. I'm just asking how it would detect the base in the first place, then we can start looking into how it would work.