Hullo,
I just made 7.1 the default for Springdale 7. 32bit build is missing latest kernel - not only was it hard to build on 32bit but the system doesn't boot with it (it does work in anaconda and rescue though). Red Hat has started patching kernel files and adding features only for 64 bit architectures (at least ones they support) and at this point it is not clear what in the newest kernel breaks boot or that this is fixable in any easy way.
Otherwise it was a rather easy rebuild with very few issues or surprises. Please refer to RHEL 7.1 release notes for details on what is new.
Please let us know of any problems,
JP