I think in the way we play now (how many times have we said that this year!) Simms will get more joy than as a target man he absolutely wasn't.
I'd expected him to replace Yates on Tuesday actually - I think he'd be decent in the last 15/20 minutes, playing on the turn and moving across the defence.
I don't think we'd select him to start unless we've no choice because Jerry's movement, both offensively and defensively has been superb (and it was an aspect of his game I criticised) and it's not fair to imagine Simms can simply replicate what Yates has learned in his career.
I don't think Simms is the problem, asking him to be target man is, and I'm happy to see him play where he needs to as long as it's not that role.