Saints trade Adam Trautman to Broncos for #195th pick (WR A.T. Perry, Wake Forest)

I think you might be underselling what it is that Trautman brought to the table. Johnson was a great receiver. But he was about as much of a tight end as Taysom Hill was.
Or Juwan Johnson’s blocking could be undersold as well. He’s continuously getting better at it, which is why he stayed on the field more than Trautman. Blocking can only take a starting TE so far if they can’t make plays consistently. A vet TE2 can be signed for that role in a pinch.