The Tigers are 25th in the majors in RA/G, so run preventon has also been a problem. Their bullpen has bailed them out a lot, but their run prevention would be a lot better if Skubal, Mize, Manning, Turnbull were healthy and living up to their potential which is pretty substantial collectively. It's probably unreasonable to expect all of them to succeed next year, but I think that is their only possible route to a quick turn around.
Their offense is terrible and I don't think any amount of mixing and matching will make a big difference. They need better players which means young hitters will have to develop or they'll need to acquire position players outside the organization.
I am curious which depth players you think they need to tap into more?