This is an interesting information. So if the navy decides that they need more Kalibr missiles, they can insert Kalibrs in Granit tubes. The question is, can they keep just one or two UKSK and take the aft ones away too free some space for increasing the air wing. IMO it would be worth giving up few missiles to get an extra fighter, especially now that they are producing blue water Kalibr carriers at higher pace.
Granit tubes were completely removed and VLS UKSK are going in their place, its the Oscars
getting tube liners.
Presumably either could be done on K, the latter may be more attractive, being less work.
Would be done to maintain its design concept as having anti-ship missiles as main weaponry.
I don't think there is really such a thing as 'too many missiles'.
Look at the pic you posted a few back, 7 is the hangar and there is a bunch of stuff between it and the Granits, it'd be a huge effort to rework that interior to provide any more hangar space.
I could buy turning the volume (& mass allowance) into more tankage for avgas and/or bombs etc though.