Oh yes, that in light of the most current data and the most current model, the idea that this particular fossil was a predecessor of birds is probably not correct. Falsification.
Your criteria seems to be that unless we can push two continents together and see the resulting mountain - the geological model that Continental upthrusting is the mechanism will be unsound.
You have confused in your mind evolution and common descent of species and what I find to be essential to either, to the point of misquoting me.
To clear up any confusion try this analogy....
Erosion can cause valley formation. Valley formation can be seen as a result of erosion forces.
Similarly....
Evolution can cause common descent of separate species. Common descent of species can be seen to be the result of evolution.
So it seems you have no problem at all with the theory of evolution Darwin described being the mechanism of evolution - so long as I call it differentiation.
Your problem seems to be just how much difference can be accumulated?
How about a 2% genetic difference?
What would stop a 2% genetic difference from accumulating between two separate species, considering that mutation IS going to happen?
the fact that by definition, species cannot interbreed with one another?