?Why would I want to commit maximum buyout to a player I have no intent of keeping in S5? If I'm going to tack on a MO for S5, why wouldn't I want to go with throwing away a lower/minimum buyout?
Because you get him for $10mm cheaper over the same term. Its a dynasty game, if you are paying $10mm over 5 years more than you need to for all of your core players then you are at a signifigant disadvantage to your comeptitors and you always will be.
I'm not saying you should
always do it, but in a situation like the example, you're base case should be "this is how I'm going to do it", then think about it. If you can come up with compelling reasons to do it a different way
think about it again because your giving away a **** ton of value if you do it the other way.