ICBW, but I think Romney is the only one that made it without an actual verification because he had >= 15,000 signatures. Paul had just under the magic number, but had enough qualifying signatures by verification.
Given the way this was worked there's no reason whatsoever to believe that Romney had enough signatures to qualify.
We could chose at caucuses ~ we could use petitions like we did back when there really was only a very small Republican party.
This system mixes things up and opens the doors for widespread fraud by elementally DISHONEST people ~ e.g. the Mittbots.