ACCORDING TO THE NFL DRAFT PICK VALUE CHART, WHICH GMs ACTUALLY USE TO DECIDE IF TRADING PICKS GIVES THEM FAIR VALUE:
In order to pick up an extra second rounder by trading down in round 1, the Packers must trade their 1st round pick with either the Bears or the Colts.
Do you really expect the Bears to give the Packers an extra pick and do you really expect the Packers to let the Bears move high and get a solid player? Division rivals usually aren't jumping at the opportunity to trade with each other...
As for the Colts, there isn't anyone they are going to really need which would make them move up to secure him. The top LB might be a reach at #16, so it makes sense for the Colts to stay in the lower part of round 1. The Colts also don't have a ton of cap room, so it would make sense for them to draft and sign someone in the #32 spot as opposed to the #16 spot.
Trading down and picking up a second rounder in the process is next to impossible.