It does not fit into my logic, although I have all the respect for I. Sünnetçi.
First of all, the all-integrated mast was discarded in 2017-18 not in the recent iteration, moreover, I doubt if it was ever included in the concept, but studied among other options with distributed radars.
Then comes the CFR watching/scanning the horizon and surface, this was one of the CFR's duties along with volume scan, fire control window, target tracking etc. See image below, i doubt if it has changed;
View attachment 65744
And finally AYR was more in the form of a data link in recent thinking, not sure if they have discarded APAR guidance already. AYR could have been used as a data link for drones, which are undoubtedly the future of any naval asset. Nevertheless, i doubt if AYR will be entirely omitted, but instead illumination mode for SARH will be omitted and it will remain as a data-link.
View attachment 65745
And one more thing, if UMR is capable of doing everything, why do we have CFAKR + data links in the Siper system? I can not see data-links in that low-res concept. We cannot imagine an air defence frigate destroyer without an X-band radar to search and track the nearby field, notice this vessel lacking Ka-Ku band tracking radars, thus leaving us to CFR. There will be at least 64 AA missiles in Siper-D configuration, 128 Hisar-D + 32 Siper-D at max, and you gotta need data-links capable of simultaneous 15 engagement windows on a side. AYR was going to serve that purpose. The data-link present on I-Class may not do this with a single unit.
It is also spacious on certain spots where they may include 2 - 3 x AKREP and i won't be surprised.
Unless we have unlocked God mode and developed AN-SPY6, I don't think it's feasible. I would like to be right on this, this time. If we are switching to a more powerful UMR then i am all in.