No, the build times and the binary size will not be fixed in the first version. About the RAM usage it looks like that there is no bug, and it is more like an artifact of the default Instruments settings. We will provide more details about it soon.
The first version is a development build to test the MOE 2.0 stack, e.g.: Android N runtime + LLVM backend + Proguard Profiler. The size reduction + build time improvements can be built on this new base. But we need to have a base first to build upon.
I will describe everything in more detail in the release announcement blog post.