I think John Ross is more than a vertical threat. He's a guy that seems to have reliable hands, good route runner, can play outside and inside, and etc to go along with his speed. I don't view him as a one trick pony so I don't see him as a limited route runner or a receiver that only best suited for go routes.He's not a guy that you want to count on winning contested catches 90 percent of the time but I think The Ravens have too much talent at the tight end position to not consider them as the big possession receiver they need for Joe Flacco to make those contested or key catches on third down. Perriman may be fast but he's a 6'2 receiver that was drafted in the first round and I doubt The Ravens drafted a first round receiver with the expectation of him being just a deep threat.
One thing I also like about John Ross is that he isn't just fast but he's quick as well which may be something we can't say about Perriman and Wallace which isn't a big knock not on them because most taller guys aren't really all that quick.