From what I've seen Mahomes, Allen, Burrow, and Herbert all read defenses better and quicker than Lamar Jackson. They also go through their progressions quicker. It appears they use their receivers better, but then maybe that's because the Raven's have given Lamar mostly crap to throw to at that position. They are also consistently more accurate than Lamar throwing downfield.
Lamar Jackson's x-factor is obviously is his running ability. He is like a Gale Sayers at QB. The big plays the Ravens hit on are often plays he makes with his legs.
It depends what type of offense you want to run. If the Ravens intend to stick with the RPO offense that was custom designed to maximize Lamar's strengths and minimize his weaknesses, then he is your best fit. If you intend to move to more of a pro set offense with more pocket passing, then it remains to be seen how well he will fit in.
Somebody is going to pay Lamar, and that contract is going to be overpayment based on passing abilities alone. It will be market price, or maybe undervalued, based on his talents making plays with his legs that brings more to the table than any of his peers. They just better hope that his style of play isn't catching up with him as far as injuries go.