Update in nuget packages...
We can't reference UmbCore4.10.0 libs as it needs MVC3 and MVC3 it's not loaded properly in Azure when using WebPages2 which we need... or something like that.
Finally we add UmbracoCore4.10.0 libs in a folder created by hand.
Keep MVCproj referencing MVC4 and razor 2 and webpages 2. We remove all other references or nuget packages except those in the MVCproj, and reference any dll from any other proj by hand to their packages' folder.
Basically...what I did one year ago but I didn't remember... as always, recollecting the hard way...