I'm not sure on your theory about TimberWolf since they just dropped a lot of time and money into it. Re profiling a ride and to cause less issues seems like long term thinking, not just short term patching by retracking.
I think he meant that the makeover will be continuing the next two years. It's possible it may go on longer than that. They have only gotten through the first 180 degree turn, so they have a lot of work to do.
The plan was to retrack 1/3 this year, 1/3 in 2016 and 1/3 in 2017.