What model? Your model?
Or are you discussing the one in the cited article called "Conformal General Relativity"? That one is complicated, and certainly is far from being "equally valid" compared to the standard model. For instance: if matter is shrinking, the universe must have once been quite large. Where did the cosmic background radiation come from?
As you should be aware by now, just saying something is equivalent does not make it so.
As to Special Relativity being proved wrong: I have news for you, that cannot happen. It will always be useful, even if something superior to it arrives on the scene. This thread is not a debate on SR, that debate is taking place elsewhere. Please do not attempt to hijack this thread for that purpose.