Muerz
I haven't stayed at the Hyatt in Sharm, but did stay at the Sonesta ( a 4*) last year. Based on that, and my experiences at the Hyatt in Amman, I would say that:

Sharm has *no* scenery to speak of - forget comaprisons with Bali and Hawaii, think more like an urban building site in Arizona (nothing against AZ, never been there, but from the movies I think it has similar desert to Sharm )

Sharm does have fantastic weather (hot n dry), dramatic deserts, great diving/snorkelling, and few crowds (at this time especially).

Hotels in Sharm are generally good value, and again especially so now.

The Hyatt will be fine, but not fantastic - amenities, etc will be as you expect, setting will be okay (they have to do one helluva lot of watering to keep the greenery alive), service will be okay-ish (by US/Bali standards, good for Egypt - there is not the same culture of service you may have found elsewhere).

In summary, if you dive/want to leatrn to dive/snorkel, then go tomorrow - otherwise, be prepared to find the whole experience a little ... lacking.

Hope that helps
Stewart