If additions to a tentative list will help Belize protect its pre-Columbian sites from
being destroyed in order to build roads, I'm all for it!
As for jonathanfr's points:
1. I'm glad Palestine didn't press its luck with another "emergency" nomination. I'm very much in favor of them submitting through the normal process.
2. I wouldn't be surprised to see the WWI funeral and memorial sites added to the list this year since it is a multinational nomination; I suspect the time for reflection on the precedence this sets will get shuffled off to next year with the Normandy nomination. And then, if the WWI nomination goes through, I wonder if Australia and New Zealand will look to extend the sites to Gallipoli (say in coordination with the 100th anniversary of the establishment of Anzac Day as a national holiday in ether country). As for Naumburg and Khor Dubai? I could see the latter overturned, but I'm not sure about the former.
3. I hope not either.