Given that the context has changed, seems to me omniscience should only matter if God wants to prevent people other than the original audience from misusing or misapplying the rules. (Obviously we’d also need to assume God supplied the rules in the first place!)
Now this does seem like a fairly reasonable assumption, but doesn’t it create a lot of problems for you? If we go that route then it no longer suffices to show or assume that each rule made sense in historical context. Now you need to believe that no possible change would produce better results when we take all time periods into account.
Given that the context has changed, seems to me omniscience should only matter if God wants to prevent people other than the original audience from misusing or misapplying the rules. (Obviously we’d also need to assume God supplied the rules in the first place!)
Now this does seem like a fairly reasonable assumption, but doesn’t it create a lot of problems for you? If we go that route then it no longer suffices to show or assume that each rule made sense in historical context. Now you need to believe that no possible change would produce better results when we take all time periods into account.