How many catholics do you believe actually have this clear, spiritually? The point is that Jesus existed before God/The Trinity prepared a body for Jesus to occupy, therefore Mary cannot be the Mother of someone Who existed BEFORE SHE existed. Stating that Mary is the Mother of God is understood in what way do you suppose by the vast majority of catholics being taught to raise her beyond what God has given us to know of her through His Word? The only major wording in the 451 declaration I would object to is that which creates specious ambiguity regarding Mary The Mother of Jesus, not Mother of God. Whast do you see as the typical definition of the word Mother, as the person in whom a NEW soul is gestated? THERE is the specious ambiguity exploited in catholiciism.
As to the notion that He is now in a body like unto us: Jesus is a much more dimensionally complex being in His current body than we are now, but when we see Him we shall see Him as He is because we will be transformed in a moment int he twinkling of an eye to be like Him. EXCEPT, we will not be a third of the Trinity, so He will always be more than we can ever be.
My understanding is that He is in the body that was resurrected and is capable of both the resurrection appearances and of the appearance in Revelation to John.
It is not helpful to suggest Jesus might have had 2 natures, one divine and one human. That is not the testimony of scripture nor of the church.