The key for me is the bottom article, with its focus on the South Shore:
The problem is, according to Parsons, the number of riders during rush hour is near capacity, about 97 percent of the NICTD fleet is in use every day, and the time frame for purchasing new equipment is two years.
"We really don't have much room to handle additional people and provide everyone a seat," Parsons said. "(The Skyway construction) is just going to exacerbate our capacity problems."
In other words, they have no space to add on cars or trains.
Isn't Metra Electric Getting some new cars? With potties? Why don't they loan us a couple of trains while we go through this problem?
Heck, I can see an addition to a couple of CTA lines which would free up plenty of space on the Electric for South Shore Service.
But hey, what do I know? I'm just a resident, I don't know enough to be an expert...