You forgot that they (the Uppsala team) are doing their research in an University laboratory. They are all well experienced Academics and also in Uppsala there is plenty of experts in any field they can consult in a confidential way.
There is no reason why they should consult a person like you.
Color vs Temperature of transparent material (like glass or alumina) is not such trivial topic as you think.
Yes, we have heard the rumor that the profs continue to be led around by the nose by AR. They continue in their insular bubble, free from criticism, and probably kept busy trying to refine "promising" results. It is to AR's advantage to keep them hoping, isolated, and working for something positive at least until the lawsuit is over.
Indeed. The color vs. temp problem for a material like alumina is much more difficult than the profs believed. But the problem is not that the surface temperature is hotter than it appears! The color of the reactor in the pictures from the report indicates a temperature in the 800's range. This is consistent with empirical studies and multiple calculation methods applied to the data presented for Lugano, putting the actual temperature within a range consistent with the visible color. I don't expect you to answer this, because you prefer to snipe and run, but how can alumina be ~600C hotter than it appears?