Well, I've just read that report and, whilst the sheer volume of data produced is enormously impressive, I struggle to extract any actual conclusions beyond those that we already know; what I have drawn from this report is more or less as below:
Mogas can contain varying quantities of bio-derived ethanol and water.
Modern light-sport aircraft with rotaxs seem to run better on mogas than avgas, some older lower compression continental and lycoming engines can run on mogas (and do in the USA - there is a list of stc'ed engines) and the higher performance injected engines can't.
The modern generation of aircraft have fuel systems made of materials which tolerate mogas and require little or no modification, whereas some old pipers and cessnas have materials in their fuel systems which won't agree with mogas, and will require substantial modification.
I'm sure there is lots more of interest in the report, but that seems to be the gist of it....