Here's the thing. If one guy gives you a reliable 6/10 on the 3C meter (offense and defense and possession etc) and another guy might give you 8/10 but to date has only given 4/10, who do you choose?
Obviously this is a crude way to view it, but if you're trying to win you choose guy #1 because he's a known quantity. You can work with that.
Uncertainty is bad and it's plentiful, so you take certainty where you can get it. If you think Lars is gonna regain his basic form and be a reliable guy, taking the risk on CMM for some limited upside is probably not a prudent move.