Goldorak thank you very much for the review!
For a short stay, the welcome amenity has more value than the room upgrade so definitely a bottle of champagne is great, even more so if it’s LP! Very well done!
For longer stays, what I would value the most would be room upgrades so I would be interested to hear reports of Diamond guests booking standard rooms and whether they were upgraded to suites or not. Based on my personal preferences, that is a requirement for any hotel to qualify for top notch elite recognition.