Updating all the old references is such a big change, that I left these old names with the warnings instead trying to update them all, so that whenever someone makes a change that touches code that uses the old name, hopefully they'll be looking at framework.log and will also fix the deprecation warning, so lib/msf will slowly get fixed as other work is done.  It also allowed me to add the new API, that matches the module caching model names without having to do all the updates now and eliminating that work from the critical path.