I'll address each of these, maybe a bit out of order. He's hardly the only coach who has a dog house. That said, the player he was the most frustrated with this year - Xavier Pinson - still played the third-most minutes and led the team in shot attempts. So, yes, he got benched when he played poorly - usually because of defensive indifference - but he didn't sit long.
I really wouldn't be too concerned about the portal departures. 1. It's happening everywhere. 2. The bigger concern should be that MU has players who don't develop and transfer to Elon and Santa Clara. It's not that you lost those guys - it's that you had them in the first place.
In-state recruiting: Yes, there have been some major misses. Mizzou has been in the hunt until the end with Ramey, Liddell and Love. No points for second place in recruiting. I wouldn't say this has to improve because in basketball you can miss on local targets and still thrive with out-of-state additions. But it would be nice to land some local talent.
As for the offense, I think Martin has shown major flexibility over the last year when it comes to tempo and his Barcelona guard-driven offense. The offense looks great when guys are making 3s and playing inside-out with threats all over the floor. As for this team that's coming together for next season, I'd still be concerned about the lack of 3-point shooting, but this team could have more variety to space the floor with mid-range shooters like Davis and slashers like Gordon and Durugordon.