I don't understand why laying sinew and muscle on dead bones would be considered symbolic especially since Matthew said that it happened literally. This is not a big deal with me, this is what I believe and I can agree to disagree on this one. But I will say that not understanding this or not taking this literally gives a distorted view of the first resurrection.
Sinew and muscle is just another form of prophetic language not to be taken in a literalist sense just as John the Baptist was not involved in a major construction project in Israel
Mat 3:3 For this is he that was spoken of by the prophet Esaias, saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight.