the link to the piece on ASW Karakurts Seig was referring:
Regarding substitution of Kalibr with ASW weapons, those were assumptions done by Dmitry Boltenkov. In any case it makes lots of sense to use ships that are being manufactured fast and have good sea keeping capacities for this role, at best it would not affect other roles too much, but we will see.
The advanced model I referred was shown twice: first time at the Kremlin on 24th of December 2019, the second in Sevastopol the 9th of January of this year. You can see plenty of pictures and further details here:
Isos wrote:It will be a new missile. I don't think S-400 missiles can fit in redut.
They say they use technology from the 40N6. Do you have the dimensions of the Redut cell?