Lets say the draft fell like this
1. Houston - Brotles
2. Rams - Robinson
3. ATL - Clowney ( Jaguars trade with Atl, Caldwell helps his guy Dimitrof get his guy, Jaguars get 2nd round 37th pick and 4th round 99th pick)
4. Browns - Watkins
5. Raiders - Manzial
6. Jaguars - Bridgewater
In this situation its a win win for the Jaguars, you end up with 6 picks in the top 100 and you still get a top QB, even if the Browns and Raiders take a QB, you still get Khalil Mack at 6 and in 2nd round you can pick somebody like Jimmy Garoppolo with one of your 2nd round picks
That trade makes no sense at all. If you want to get Bridgewater pick him at 3.
If you feel like Bridgewater is your franchise QB you take him @ 3...by not taking him @ 3 you don't feel that he is that so the pick would most likely be Mack in the above scenario.