This is the conflict in a nutshell to me. I'm not convinced there's pent-up demand for stand-alone Monday night tickets. I think you just give the multi-night ticket holders another six or twelve nights to come on their $100 ticket. Meanwhile, the masses are still going to want to come on Saturday or the Thursday night school is out the next day and overwhelm the park.
At the end of the day, many nights you have 30 - 40k guests who want to see 10 E-tickets with surprisingly low hourly capacity. You either significantly increase that number of E-tickets--very difficult from a creative and staffing perspective as I've discussed before--or you get bring in fewer guests, and better get more money from them to make up your bottom line.
A final thought on RoF/FF. Orlando locals buy APs so they can go to a park whenever they want. They buy RoF/FF so they can go whenever possible.
[Theoretically Nick your plan could address this by adding all sorts of tiers of FF--a M - Th only, with Sundays and Fridays and Saturdays each an additional upgrade. But when you need a spreadsheet to explain pass options, it becomes too much. If the high end FF are going to be more expensive anyway, why not just offer the high end and skip the hassle of running 7 days?]
The biggest mistake to make on these forums is to assume the average guest has more than 2% of the information we do. Average 1-night ticket guest doesn't know about S&S, doesn't even know what the houses are if they weren't up on a billboard. But those are the ones Universal needs to worry about, because they are the ones who possibly won't be back next year. The smart-marks on this board, for all our complaining, will still be there Opening Night 2019.
A single show that pulled at the level B&T did would've helped this year. But again, B&T reached icon status over a decade ago. Good year, bad year, guests still were going to show up ... multiple times. You can throw Truck-zilla or some magicians who tour colleges in a venue, but if they don't pull a crowd, what's the point? Be like running Kang & Kodos with empty cars most of the night.