Speaking in general matchup terms with Rumor Mill:
HB seems like they might have the best options for switching up their glacier play in the face of Rumor Mill, between Domestic Sleepers (already kinda on-the-bubble worthwhile when you can get to 6 points) and Aggressive Secretary (which is probably the only real bluffing trap that’s worth it for glacier, besides Reversed Accounts). Enhanced Login Protocol also isn’t the worst.
Jinteki has Cerebral Static, which might be more worth playing in the face of this. Sure, they can play Rumor Mill turn 1 and get in, but at least you can overwrite it right away. They’re getting a 2/0, but it kinda sucks hard, so I don’t think it will ever be worth the include. I’d like to see them get a trap that plays nicer in the glacier-style, rather than kill style. Edge of World is neat, but you have to play never-advance for it which is kinda a bummer. The brain damage doesn’t necessarily have a ton of impact, either.
Weyland might not really be hurt too bad by this. I can’t think of a particular unique asset/upgrade that they’re using that’s hit hard by this. Even if they do, Paywall Implementation is a pretty solid current to counter-act, and Hostile Takeover remains great.
NBN still has Breaking News/15 Minutes and several good currents. Targeted Marketing and Predictive Algorithm are solid anti-currents. News Now Hour is a pretty terrible answer to this unless other Runner factions start packing Currents (and I hope they get some more nice ones, so they do!). I guess it plays well against “Freedom Through Equality”… Reversed Accounts is also a decent counter-asset for glacier.
If Blackmail ends up being the real problem, there’s at least a few solutions to removing Bad Pub. Perhaps it will even make Illicit ICE more available if you’re going to need to be playing BP removal anyway… I’d like to see some more Corp cards that interact with BP if this is going to be the case.
So, it seems like there’s reasonable counter-play that exists. Aggressive Secretary is a card that I think might even be under-represented in today’s game. It’s effect is mitigated by all the recursion around, but at least it requires the runner to invest in re-installing their junk. But, I digress. Much like almost every hyped card that’s been revealed, I doubt it’s going to be quite the level of doom-and-gloom that the community predicts ahead of time.
Same Old Thing presents a truly troubling obstacle to playing around Rumor Mill, however, since even with all of these solutions they are rendered moot if they can’t give you at least a few turns of breathing room.
Edit addendum: I also want to add, I kind of like that this card makes hanging onto Jackson more risky. I’m a big fan of how the existence of PolOp has sort of organically affected the power curve of Jackson by forcing the Corp to use him more in a more disposable way. I’m hoping that Rumor Mill can push him a little bit more in that direction without completely breaking the card.