For one, I don't see GB likely to trade up for a QB, and they wouldn't give up that haul for a non QB, so that's not worth talking about. They'll at least give Love a year before they give up on him, if Rodgers indeed ends up retiring.
Just going by the numbers, it's more likely that Detroit gets a bust or just a decent QB (Jared Goff 2.0) than they would get a game breaker. So considering the value we could get from them, I do that in a heartbeat. You still get to draft whoever you wanted by just moving down one spot and grab another 1st and 2nd for the not-trouble. No brainer.
The Seattle trade is a no-brainer as well. Trade down two spots from the 1st, still possibly in position to get who you were going to take anyway, grab another first and second, along with a trade up 6 spots in the 2nd. Oh, and another 1st next year. That'd be a dream come true.