but I wonder if separating the years of track re-work is less effective then a full off-season re-track. Another factor are probably the PTC trains. I expect, and look forward to getting beaten up by a Grizzly bear every trip. I'd ideally like to get a different experience from this ride though.
Doing a bit at a time is less expensive, obviously, and being a wood coaster makes there little advantage to doing it all at once. The work they did for 2009 could not wait any longer, I'd go as far as to say the alternative would have been to close the ride. Comparatively, the rest was in great condition. That section of track is already getting rough again, showing it needs retracking more often.
At a much later time they rebuilt part of the drop structure, which goes beyond even retracking. I don't understand why, probably they didn't like the look of something and they were retracking anyway.
Retracking all at once would have avoided needing to close the south side for retracking
during the 2017 season, however. Few noticed though.
As to the PTC trains, Racer has no fast curves so they don't damage the track as bad as on some. They could be better but I wouldn't trade them for Millennium Flyers' on THAT ride, with their autotightening bars without a return spring and no wheel seats that allow the newbs to absorb the bumps for you.
RE: ending the backwards train in 2008, I don't know how they weighed the reasons but I don't think you're going to ever hear it was because the ride was borderline unsafe even riding forwards. I know both RY and Grizzly hurt me that year (NOT Hurler). The way I then learned to ride RY was to push down hard with my feet at an exact split-second as it entered the rise into the turnaround -- try that backwards. It still had a kind of random bounce to it that seemed that might work for 100 rides and then on ride 101 it might just snap you.
Currently, the ride that really needs work IMO is Grizzly. It took on an oscillatory bounce or "pogo" -- different than washboarding -- late 10/2018 that persisted all last year and takes the front row from the smoothest row to one of its worst.