He is not ready for the NHL and can't skate at this level. You can see that he just doesn't get to pucks and spaces he should be getting to and is a step behind all the time.
To be fair he hasn't played in forever then gets thrusted onto the toughest assignments on the team with Horvat against Marner -Matthews and Draisaitl-McDavid. Even Horvat was looking bad last game
I agree with what your saying and this team is so friggen slow already they can hardly afford another slug but he needs to get some games and a reduced role. Can't blame Green for putting him in the role you would like him to be once he matures and giving him a chance to be productive for a start. That's honorable given the season is a wash.
The thing with the NHL is you need to be one step ahead mentally and he has very little idea what is going on and is having to rely on read and react which is gonna go really poorly for a player without standout athleticism.
No argument in the assessment just feel he needs to get a legit amount of games to get comfortable so he can maybe have a legit chance next year of being a serviceable roster player. I remember Burrows being awful for a whole season before he became serviceable then we know the rest of the story. He was a unicorn but Lind still deserves a fair shake. I would probably be more impatient if i watched as many Utica games as you have.
Nothing to lose just let the kids play and see what happens.