That would be pointless, as we already have an Uber tier. If we were going to do this for consistency's sake, then it is obviously more convenient to go with what we have now instead of making OU a duplicate of Ubers. The Uber ladder has been up for over a year now, more than enough time to determine what is 'Suspect' and what isn't. We could've done what we are doing now, but instead we decided to take the other route, selecting the Ubers that are not obviously unbalancing for OU on the evidence of the Uber metagame and testing them one at a time in OU. The reason for this was probably that the number of Pokemon that are obvious Uber material is greater than those that are not, hence this process is more efficient, but then again I would be in favor of testing all the suspects in OU at once if that was the case. I think this will most probably be the case, starting with an Uber metagame off the bat and quickly forming a 'rough' OU based on this. The tiers could then be refined over time whilst not completely impeding the development of the standard metagame.