Well maybe sand theme doesnt fit very well into tf2 world for you, but its nice to have some variety in scenery after 26821 rounds of dustbowl

And I dont think new revision of the map was tested on spa servers, and you probably will get the same ratio of stages 1/2/3 as dustbowl.
but like goldrush i very much doubt balanced teams will get past the first section. I have played Egypt a few times, and apart from the massive doors i'm not a fan. Sand theme is cool just dont think there is enough variation imo. and dont get me started on dust2bowl.