I am generally a fan of pushing high quality assets out a bit if you have so many of them.
3 1sts, alot to take in one year. I would much rather get additional assets in the future, especially if my firsts all fall in the same ball park (15,16 and 19.)
Yeah, in basketball, the value gradient of picks is very different than in football. Even dropping from say pick 10 to pick 25 in basketball is a huge drop. But in football, with 7 rounds, there is a lot of value in the middle rounds. So to trade say pick 35 for pick 50 and a future 3rd is getting a lot of future value. Those future 2nd, 3rd, even 4th round picks have a lot of value in football.
Thought of another way, in basketball, with 60 picks, a pick in the top 10% is a top 6 pick. In football, there are 224 picks so there are 22 picks in the top 10%. Your needs are going to vary from year to year but the Patriots have done well overall by trading back from what I can tell. They may not this year as they have more pressing needs than in the past but it would not surprise me or disappoint me if they do end up with some trade backs.