Because we are merciful and shit, the apartment attack will technically occur the moment all this business with Lucas is sorted out and finished, giving you plenty of time to deal with that clusterfuck before having to deal with another one. Calling for GM action on it is dumb, period. The entire situation at the apartment has always been one big thing after another constantly happening, with maybe five minute breaks before DRAMA or FIGHTING and ARGUMENTS. This fits in line with that perfectly. You were fine with a crazed killer showing up completely at random and wrecking everyone, as well as one of your own PCs literally turning homicidal for no reason, so a little probing force should be nothing compared to that.
Actually, you should've expected it. You guys have been making the loudest show ever at that apartment all night, right after slaughtering almost a hundred vampires all over the city. A reactionary attack isn't strange, it's perfectly normal, even if just as a revenge thing.
It's not exactly endgame content either, because it's literally just a bunch of mooks. Not even a hundred of 'em, either. The attack is meant less to kill you guys than it is to get you to, I dunno, do stuff. Satoshi could literally flatten them all in less than five minutes, and that's perfectly fine. Perhaps you just overestimated it based on how awesome my post was.
As for why the camera's been there, that's because it's watching Forest, not you guys. The Law Unto Herself is a big name in Nexus, and SPOILER/Medea have had plenty of time to know the big players in the city. You people showing up did cause them to hasten the attack, but it was always going to happen, with Forest being the primary target.
BTW lantz, you can choose how effective the castle attack is. Feel free to lolnope the attempt to break the door and to have all the warriors instakilled by your knights. These guys are meant to be killed, not to be an actual threat. Same with the apartment. Just getting info on Satoshi would be enough for Medea and SPOILER.
Oh, and as for the one month thing, it's basically that SPOILER and Medea have been in Nexus for an entire month before your characters showed up. This isn't to be hax or unfair. Simply put, a villain is always more dangerous if it's been given a chance to establish its forces and gain a foothold on the city. Thus, the month timeskip was necessary.