We have been shooting "everything" 10 for a long time. Shooters will adjust to it. We don't like it but it's the law.
LE is exempt in our law but we still download to 10 in competition. We were doing this a long time before USPSA put it in the rule book. We had a level 2 match here.
I don't see how a match director can make a decision or have the authority to allow shooters to violate a law for a match.
As for Limited/Ltd 10, that debate has been around for a while. For me, I don't care if Ltd 10 stays or goes. With the USPSA rule, Ltd 10 should be disappearing sooner or later. Some may not like my opinion, oh well.
BTW, I shoot mainly in Open ?