Pay Boyd $30 million for 2 years instead of Cobb $15 million for one season, for starters. I'm sure there were other starting pitchers available that he didn't go after. (Or couldn't)
Be more aggressive with Boras over Bregman. Make an offer in November and give him a week to decide. Turn it down? Find another 3rd baseman. What did we get? Boras dragged his feet and all the other players were signed or already traded. And Harris saying "Oh well, I tried."
Look. I get your opinion. Harris was in charge when we started contending. And we all like being in a division race. But I have to agree with others, Harris didn't really do much to build this roster. So all he had to do was to add a few quality players to the roster full of Avlila's players. And at that he's failed miserably. Sure, give him another off-season to acquire the needed players to get us over the hump. I don't have much faith that he'll be able to but he's our best chance.