In a no BS, no hate serious answer to this question.
I followed and tracked cleary , tatar, franzen and datsyuk one game
start to end.
(SJ vs Det 0-0) game.
In that game cleary made no major errors or giveaways. He also did nothing at all offensively. That type of play is called "solid defensively" i suppose, he did save a wrap around goal in that game, but that is more than usual. A player that has little speed, little offensive help, but makes little to no errors is a good 4th liner or maybe 3rd liner on an offensively challenged team or on a checking line. Only cleary is not on a checking line, he is just on the 2nd/3rd line.
I would say he has been boring and uninspired, and uninteresting BUT not making some of the horrid giveaways bertuzzi made that game, or quincey/lashoff did.
Tatar on the other hand also did not have any Horrible giveaways, but he had some. BUT he also made some sweet passes in the game and made the game interesting to watch, and created some offence even though the puck didnt go in.
If cleary is a "safe" 4th liner, he is fine.
If cleary is there to create offense... he is not good and should be replaced by younger talent (Tatar) right now.