You have some lovely heat/scorch markings in two spots on the insert of that flywheel, not to mention as you said the uneven appearance of heat markings on the pressure plate disc.
Place the pressure plate down on flat surface, confirmed flat, very flat. Measure from the surface to the bottom surface of the pressure plate bolt tabs (underside facing the table now).
I am wondering if we can tell with a single stroke if the pressure plate apply springs (3?) could be weak or one out of spec.
Sure is a hell of a lot of heat going on in there.
Is this combination new?
If you can setup a dial indicator on the flywheel friction surface, and then measure it in five different locations (without moving the dial indicator - just rotate the flywheel) then we can tell if the flywheel has some abnormal lateral runout like a brake rotor exhibits.
Check your crankshaft end play while you are in there for shoots and giggles. This also makes use of a dial indicator.