I am not educated enough in the anti/pro sabbitarian debate to understand what I may be inadvertently stirring up , but I do agree with the "sabbath rest" principle. I would say that I am not a strict Sabbitarian subscriptionist today in that I believe that at one day out of seven should be set aside for rest and corporate worship, but that circumstances may require some irregular praxis and that the practices of the Sabbath are not as strictly rule bound as in the OT.
That is, the old "ox in the ditch" principle.
So - I would say your point is apropos as it concerns consistency, but I would not think even an strict anti-Sabbatarian would support your proposal for pragmatic reasons.