The CYs in Hong Kong are stingy about giving suite upgrades. The CY on HK island has limited suites so it's understandable - AFAIK for Plat staying for 1 night they will very likely upgrade you to a suite. The one in Sha Tin is a totally different story - they upgraded us to a "premier" room as Plat - Then I told them that there is a suite upgrade for suites if your stay is less than 3 nights (we had 2 nights there). After extreme struggle I got a studio as an upgrade.
In Marriott Shanghai city centre - no upgrade. Autograph Tokyo got a corner room upgrade - that was nice. CY BKK - a family room as an upgrade.
The only suite upgrade was JW Macau - got an executive suite upgrade, but still after some negotiation (Conrad in the same city pre-upgraded us into a 2 queen suite).