Sadly, BGG, many of the working scientists tend to be pretty hide-bound by the time they start doing real science.
Take, for example, Dr. Thomas. A font of useful info, but unwilling to consider that what he thinks is right might be based upon inadequate data. And unwilling to have data he believes in questioned on the basis of the quality of the source data... Especially by "laymen." This is, in my experience, Typical of many working scientists in many fields.
Edit: This isn't intended to be a personal attack upon Dr. Thomas, and is based upon his behavior in a prior thread. I do, however, feel it important to leave this substantially intact. It isn't always true of him, but seems to be generally his reaction.
In planetology, there just isn't enough known to be useful, other than proving current theories are not adequate description, since they don't generate and/or allow for all the results we know can happen by observation...
The current theories ARE important, in the same way that early germ theory was important: even though they are both examples of error from inability to get good enough data sets to extrapolate from, finding the errors leads to revisions which are more useful.
The basic physics models say that a big enough ball of gass should self-compress to higher density than SG0.5g/cc (half that of water at STP); Saturn is supposedly pretty close to the "minimum density sweet spot"...
That this thing is bigger than saturn AND less dense by a factor of 3, well, that indicates some serious oddities...
Which would say that the thing has higher internal pressures than mass alone would indicate; given the orbit speed, that it's thermally heated to the point that the core isn't compressing to metallic Hydrogen... but that's a guess.