I think part of this is related to the addition of Full IIS. It used to be that your Windows Azure helper directory was for both the RoleEntryPoint process and the IIS WAS Host (one in the same). However, with full IIS, you will have w3wp.exe executing your web code and the WaWorker process executing your RoleEntryPoint.
( WebRole.cs RoleEntryPoint) IIS. , , - . - WebRole.cs RoleEntryPoint. RoleEntryPoint . , , / -, .