Really? I think it is quite simple to understand. Say what you will about FP+ but it was certainly more fair because it was free.
Genie+ is less fair to those who have less disposable income and simply cannot afford the extra cost. Disney has done a very good job creating a class system where the first class customers (i.e. high income, Deluxe level resorts...) have a much different experience than second or third class customers.
To say everyone is on the same playing field because people can simply learn about Genie+ when they arrive is a stretch as well. The learning curve for all the nuances of the current system is far steeper than the simplicity that was FP+.
Regarding the FP+ vs. G+ fairness issue:
I cannot tell you how many times I got a FP+ on the day of and not 60 days in advance and how many times I booked a last-minute WDW vacation and was still able to get FP+s for many E ticket rides. People would cancel their FP+s and availability would appear. The same way ADRs become available the day of.
As far as G+ goes, I used it several days of a recent trip a month ago. If we're talking fairness here, G+ costs $15.98/person/day. In the world of fairness, I'm not sure how that's more fair than something that was free. Because, you know, people have different financial situations. If you wanted to, you could say that the Plaid VIP tours are fair because anyone can book them! But, uh, a heckuva lot of us couldn't afford this.
Speaking of fair, for the $15.98/person/day of G+ we often used it for only one attraction in the park we were in that day since by the time the window to make a new reservation opened, the only times available for the attractions we wanted were so late in the day that we wouldn't be in the park anymore at that point. With G+ you cannot pick your time. You have to either get lucky and/or be the kind of parkgoer who stays in the park all day so doesn't care what time G+ gives you. Is that fair?
And no one could possibly convince me that ILL$ are fair. First of all, they favor onsite guests, who can book ILL$ at 7 am, far ahead of off-site guests. Not fair. Plus, ILL$ favor those who don't mind spending even more money on their park day than they've already spent. If you have a family of 4, say, and you buy the ILL$ for RotR, you may've just spent an additional $64 (okay, I rounded up) for one ride.
Yes, sure, you can always use the standby line. But G+ and ILL$ have caused a lot of standby lines to become way way way longer than they were back in the actually fair days when there was no FP+, no G+, no ILL$, and everyone did standby. You could even argue that the lottery system for RotR was incredibly fair since it favored no one. You could have the snazziest smartphone in the world and
MDE could kick you out and you lost your chance. You could get lucky and get an early BG for Rise and then the ride would break down and be closed the rest of the day.
I mean, what is fair? I gave info on FP+ to many many other parkgoers through the years and in December I gave info on G+ to many people as well. FP+ was a relatively straightforward system and easy to explain. G+, OTOH, is not straightforward, difficult to grasp the intricacies of, and, besides that, costs $15.98/person/day.
I'm an early riser, so the 7 am aspect of G+ is nothing to me. But having to wrap my head around tactics for every single day of the trip while I'm there is not exactly fun. I don't love RDing, either, but I do it. It still works. And it requires very little knowledge and explanation. But it's unfair too, since it favors onsite guests.
To sum up, to me, the fairness or unfairness aspects of FP+ and G+ are irrelevant.
[Edited to clean up a couple of things.]
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