You're projecting what probably will be an unlikely scenario. Ultimately, we don't have Loomis' game plan in front of us and we're making assumptions about things we don't have enough information about.
DD's situation is nothing like MT. Same for Jameis. The FO has already made plans for JW, and we don't know the specifics of that yet. Peat is an open question. He might be able to play another 3 years, or he might retire next year. We won't know until it happens.
In any case, there's no doubt ML has contingencies in place depending on how things pan out and some of those include contract clauses that do protect the team to some degree.
Ultimately, what's more important is making good choices with the draft and free agency and they've been hit and miss over the last several years. The team has the talent to compete with anyone except maybe the elite teams, and there aren't that many of those considering how much parity is in the league now.
The coaching staff, particularly the HC has left a lot to be desired. DeMeco Ryans is showing how important being an effective leader is in Houston. Everyone, myself included thought they were going to have a bad team with a rookie coach and rookie QB, but they're getting the job done with solid leadership, something sorely lacking from our coaching staff.