Shouldn't Siri use iCloud to post alarms for ALL my devices?
Siri and iCloud
These are the Developer Forums, where THIRD-PARTY developers who are writing code for their apps for Apple's platforms get together to figure out code and fix issues. This is NOT the place where Apple's employees hang out and take suggestions from the public.
You need to visit discussions.apple.com for your question. If you have a suggestion, raise it feedback.apple.com
Thanks.