Look at it this way Carl, when a 600 gets old it can still race in middleweight with a reasonable chance. Now that we have 1200cc twins not only is your bike getting older but it is getting smaller as well so is it unreasonable to modify the rules to let these people have a home as well.
We had people stop running the SVs due to 749r ducs running GTU, how many people stoped running RCs and TLs or even older ducs 916 to 998s with the advent of the 1198 and the RC8R.
We plan on letting the 675 come and play as well as some others but the 675 has a home where it fits very well a lot of these others do not anymore.
I understand where Brewer is coming from about making rules for obsolete bikes but if we can get more people to bust out their old twins to come out and play.