I attended a meeting about ten years ago in Portland, which was while the Downeaster service was still just a proposal. It was stated, that the main objection of then Guilford to the service was that they would have to maintain the track conditions or might face a repeat of the Vermont situation. So far, that has not seemed to be a problem with the Downeaster. There are occasional slow orders, mostly switch issues, that are taken care of reasonably quick and in the last two years, there has been a several day "blitz" to take care of welding, rough track and the like. Of course, the Downeaster contract with GRS/PAR is likely quite specific on track standards, where that probably did not exist in the Vermont case.
In my opinion, the CV maintained the trackage better once is was rebuilt, than its successor Railtex. In turn, Rail America has not maintained the trackage to the Railtex level. Rather, they seem to wait for a Sperry inspection and then have as many as several hundred issues to address, with scores of slow orders in the meantime.
It remains to be seen how the new "investment" owners will do on track maintenance. But, the bottom line is usually anything and everything to these types of owners.
Dick