Just wait and see the lowball offer or no attempt at all to resign Landry and then come at me with your stories of his future with the team or how they didn't listen to offers because it makes so much sense to have him leave for nothing.
When it's your player, you have options. MIA could put the non-exclusive franchise tag on Landry; no one is dumb enough to give up 2 firsts to get him, and if they did, it's worth it. Or MIA could put the transition tag on him and have right to match, which will let you know exactly what the market for him is.
That is the real value in what SF traded for when they got Jimmy G from NE. You aren't trading for half a season, you're trading for franchise tag rights.