Well, last two security updates in region: IN for XZP has been very much "on time" - within mid month, both in March and in April. Current version is: 47.2.A.10.45 as of now, today.
Even if these are just security patches (and I shall check and revert if anything else has changed), it reassures one to know that patch management timing for XZP is improving.
Kudos to Xperia Support Team. 
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