A tire change in a Spec class is the single most fundamental change there is. Spec classes live or die on rules stability. There are no plans to change tires. The RA-1 is fundamentally a very good tire for what we do, and critically, it is a known quantity. We fought hard to get it back, and are better for it.
It would take a lot of compelling, well-done data,and other good reasons, to start the process of considering a change. Any change of that magnitude, tires or otherwise, would only be after a long period of research, and open rules discussion. Gathering data for long range planning/options is always prudent, but does not mean a tire change is in the works...
Hope that clears things up a bit!