Simulator assessment, either as per EASA / FAA, or to find ‘something seriously wanting’, requires knowledge of the real aircraft / system for comparison. Thereafter its ‘jump through the regulatory hoop’ and well considered judgement, where experience and strength of argument are important.
Assessing a simulator as an ‘unknown’ aircraft could be interesting, quite revealing. I recall one ‘story’ that an experimental aircraft simulation was found to be so wanting it would be considered un flyable if it were a real aircraft !
As with most assessments, first understand the task, the fundamental limitations of the device, and the objectives and boundaries of the assessment.
With regard to a thesis, defining and evaluating the method of assessment may be of greater importance than the result - your theory. Then test it; but is this with a viewpoint of an engineer / designer or a pilot / user, and how might any differences between views be reconciled ?