He's had something like 120 days in office to get him to sign, 2 days left for it to happen.
I'm not entirely sure that he and Barcelona are entirely as desperate to keep him as they allow it to be made out if i'm honest.
There have been points since he took over where it definately all could have been concluded if they were willing and Messi was remotely willing, before now.
I guess we will know in the next 2 days.
If he does sign an extension, I expect a 'never in doubt' claim from both parties. Messi will say there was only ever one place for him, Laoprta will claim he knew he could convince him all along.