A very very very junior members with sod all experience
I think I've explained this to you before - I have understood equations of motion and computational fluid dynamics long before even dealing with FG. It's stuff I have taught to students. All I've had to learn is how to use JSBSim syntax to apply it.
But see, you'll always find a reason to argue why I shouldn't discuss flight dynamics. Rather than watch and learn something new
The problem with the list you mention is that it is based on putting in numbers in the fdm. Who on earth is going to check if all the numbers are put in right?
That's a misunderstanding I think. You don't put an approach or stall speed into the FDM - you put lift and drag coefficient functions, and if you did it correctly, the right approach speed comes out. If the pilot's handbook says you should touch down with 140 kt and you can't, you know the FDM is wrong even without checking the numbers which were put in.
(Edit: Well, you do in YaSim, but that should not ever get a rating above 3 by the very design of YaSim, because it makes so many features generic)
There are developers that claim (and probably did) put in all the numbers.
Yeah, though there's the catch with imperial vs. SI units, deg vs. rad,... so putting it in correctly is a different matter. Also, you may not have all the numbers, and the numbers you have may not apply to the region you're interested in - say I have aerodynamics at Mach 1 - the tables are unlikely to result in the correct approach speed because I'd need a table at a much lower Mach number. Or the numbers may be correct for zero AoA, but not for 20 deg - again this spoils your approach speed. So you have to understand what the numbers mean in order to use them.
So the question is not about putting numbers in you got from somewhere, the rating criterion actually judges whether the resulting flight dynamics agrees with what the handbook says or not.
Which is to say, your practical test is quite sufficient for what you want to do. Let me re-iterate that I think you can apply all your criteria within the existing scheme and argue that a plane should be rated below 2.