Maybe, but I agree with Coelacanth, haven't they already confirmed with the FIA for the season ahead that it's fine, exactly as they did with DAS?
I think from a practical standpoint engines are a bit of a special case as it is. Mercedes are powering the most teams of anyone and the planning ahead for building it will have taken years, so in cost conscious era it's a bit wasteful to force a redesign now.
Given they have shared all the info with the FIA it's not quite the same thing as Ferrari's fuel flow sensor trick which was not revealed and signed off on in advance.
Also, Mercedes might be slow as shit for all we know and it won't matter anyway π€·