I too have an r2.5 that was not part of the recall and am delighted that it was not part of the recall. I have not the slightest hesitation in riding it and love it, further more I prefer riding it to my S2.
If you don't enjoy riding it any more or want a new bike just go buy one, but as for replacing a frame that was outside of a recall 4 years ago, I can't see why CErvelo would or should do so.