The creator of The OoT Hyrule map said he uploaded a new version of the map which addresses these issues, and fixed the pyro crash thing. And said that the missing textures in the water are just a common source bug if you loaded another map with custom water before hyrule, in this case, can be fixed by restarting the game. ._.
The updated map is version alpha_13a
They should bring back The OoT Hyrule map. It has multiple spawn exits so at least the teams won't get COMPLETELY spawn camped.
Also, there is a map of Aquatic Ruins from Sanic and Dark Tower from paper mario?