You are stating the Thomas Bucks County Research Team's conclusion. If Evan, Sr. died in 1766 in Bucks and his death is recorded in church that stops idea that he went to VA. However, we have not based our rejection of the theory on this but for the reasons you stated so well. You're right the Church issue is a red herring to keep focus off the theory, which is not and I submit cannot be proven.
The reality is however, if individuals work the way the theorists have without regard to logic, one can write a statement to make almost anything possible. And it is a very well written statement--on that I'll congratulation them--at least has the appearance of credibility if even content does not. However, it is up to them to prove anything so speculative, not those who support the more expected outcome to a man's life--he dies where his only known children lived--where he had lived the entire time after coming to the colonies. All the other talk is absolutely superfluous without an iota of proof that relates to the theory.