It is obvious he is going through a form slump. If he finds some of the form of the back end of 2011, then sign him up. If he doesn't, don't. It's pretty simple IMO
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When would be the deadline for the decision though? Players understandably like to know where they are heading well in advance so they have managers to sort that out for them, thus there is pressure on the club to make a decision however the club would probably like the scenario you have described Stripes but mightn't have the luxury of time to wait and see how his form pans out therefore could have to make a decision based on his current form. It's a tough one for all concerned but one this is for sure, Moltzen could make it a lot easier by lifting his form rather than leading with his face.