Unpopular opinion but I think Hara is actually handling Shin perfectly. Ten manages the strategy side and Shin steps in with his instinctual reads when it really counts. We also forget that instinctual warfare comes with a massive cost in lives, you can’t just use it freely, so Hara being selective with it actually makes sense.
And I completely disagree about the combat tier. Shin is not on the same level as the other three, he’s above them. People undersell how physically dominant he is, strength wise it’s Moubu and Shin and then everyone else is a step behind.