My first point was more in reference to those that are arguing that TWDC/TDO is likely to remove the monorails. The company just spent a chunk, no doubt, to implement the automation upgrades across the entire system. While the automation system clearly still needs to be fine-tuned, that's a major investment to undertake for a transportation system that you're going to just throw away.
My second point (as they were intended to be distinct - I was clear as mud, in retrospect) was that maintenance seems to be improving.
Lastly, unfortunately, you are correct that a true reinvestment to fully refurbish the system is indeed what's needed, but very unlikely to happen. They will do what is required to keep the system safe and operational (albeit with downtime), but nothing more.
And what a shame. How many municipalities wouldn't love to have an overhead, quiet mass transit system. Disney really needs to view the monorail as a mass transit system that's cool, rather than a cool ride that moves lots of people....
And before you say, "but they do", stop and think how many large municipalities would let one of their major thoroughfares get to this point (other than for lack of $$).