So I am in an almost Identical situation except I do have an agent that is sort of a mediator between the seller and I.

Mediator would likely say you do not (and that is where it would go first) and MREC would likely say that you do.So, it is not as simple as if you do nor not.

This will help keep both of you out of court or, if you do end up in court, helps the judge to mediate your argument. 

If this actually goes to court or just to mediation?  

I like to use a touchy freely mediator perspective, it makes me feel good. :)What I’d pay close attention to is the similarity of advice, if not of style.

Architects also act as a mediator between you and the contractor and since you hired them they keep your interests a priority.  

You probably will have to go to mediation and if he has a smart lawyer will file lis pendens on property if mediation doesn't work out with a ton of legal fees

You have sit down with all 4 SEPARATELY and a mediator (repairman or inspector) and find out what they need to make you both happy. 

PS there is usually a mandatory mediation clause in those board of realtors Purchase and sale agreement at least in many of the markets I work.. that could be worth a shot... that will only cost you a few grand..

Between what I expected to earn that year and the support I was granted in my mediation agreement, I could not afford to rent, much less purchase, a 2-bedroom condo in Oakland, California, where I planned to move after raising my children in a suburb half an hour away.Dad to the rescue!