Maybe a tiny bit worse than they used to be? Broadsides aren't Str 10 anymore, so there's that. But fusion blasters are 18" range (meaning melta at 9") and Crisis suit changes mean I would expect to see more of them.
Also, there's a Hammerhead upgrade tank commander that makes the tank BS 5 and have tank hunters. Hammerheads are stupid cheap now at 125 pts, and he's 45....I would expect most Tau players to take him, I sure will. Hammerheads railguns are still Str 10. Broadsides can get tankhunters, but that's just a reroll, so it won't let Str 8 pen AV 14.
Riptide will either have a Str 9 Ordance (so much like tankhunters, roll two dice tanke the highest) OR a hvy 12 Rending gun. Not really great odds on a Monolith, but he can do it. Of course, he'll just murder it in assault.
It's changed in that a LR heavy list with assault troops won't be just invalidated by Tau, cuz there won't be that many Str 10 Railguns, and Tau assault can probably keep the fusion blasters off (maybe, won't be easy). That's probably a good change.
But one Monolith? I think the Tau player would kill it first turn. There's going to be at least 1 Str 10 Railgun, with rerolls, that ignores cover, heading it's way at least.