You are right in saying that the Golan retains a strategic value. You are absolutely right in pointing out the issues of trust involved. As long as Iran has the influence they have within the region, it would be risky to give up such a strategic asset. It has also been reported that a major foreign power has a listening post just on the border and information was being passed to hiz. during the war. There are those who think that syr. can be pried away from iran, in return for the Golan, but that is just a huge gamble given iran's outsized ambitions. The issue is much more complex than the proponents of this plan want us to believe.
from the article: Was it a war of choice?