I'm not convinced that Meyers "is what he is" at all. He's a QB conversion who didn't start playing WR until after his redshirt year of college and was raw enough to go undrafted. He fought his way onto the Patriots then took a huge leap in his second season, despite having Newton at QB. In this preseason he looked even better. To me, he seems like the model of a player on the rise.
Here's something funny I just noticed.... It's easy to forget how long it took Julian Edelman to become Julian Edelman. In Edelman's first four seasons combined, with Brady at QB, he totaled 714 yards receiving. Meyers in 2020 alone, with Newton at QB, put up 729 yards.