When Bradford was traded to Minnesota he was very close in age as Tannehill now, similar cap number, had previous knee surgery too...the Eagles were content going into the season with him as the starter but that didn't stop them from drafting the QB they loved in Carson Wentz, then they got lucky with the Bridgewater injury getting a great deal for him out of desperation a week before the season, which cleared the way for Wentz and his 16 starts as a rookie went a long way in the development and improvement he's shown in year 2. Can you really say Tannehill has shown that much more than Bradford had at the time he was traded?
We need to take a QB within the 1st two rounds, it's imperative. My dream scenario is Lamar Jackson in the 2nd. After that any team offering a 1st for Tannehill can have him. I'd strongly consider two 2nds as well, especially from a team like Cleveland that picks 3 times that round next year. But I highly doubt we get a 1, I don't think Tannehill is that highly thought of around the league.