At the moment, Florida Resident offer tickets (ie, the Discover Disney ticket), timeshare tickets, and Cast Member sign-in tickets would seem to be excluded as they aren't Magic Your Way. Right now they get access to the FP system. But should WDW really be giving them access seeing as they pay less or nothing to get in, now that they have an opportunity to switch up the system?
Because those are going to be the difficult tickets to get to. They also most likely don't number nearly as many tickets as KTTW and APs do. FP+ requires the different media than the existing tickets. So existing tickets in use need to be replaced, and new compatible tickets sent out into the world. Since KTTW are created on demand, that makes the most sense as the first target group. Nothing to try to get back from resellers, just swap over the in house stock and voila! APs I can see being second as they are on property frequently, and will get heavy use out of their ticket, (unlike a local Play4 or whatever they are called now). The other ones you mentioned should eventually be added. But those they will also take the longest to remove from the market. And by simply not saying those tickets work, WDW can wait until they have covered the other bases, and let alot of those non-compatible tickets work themselves out of the market. So even if a FL ticket you bought today could work, WDW would rather simply not have you know it, than to have to explain to the people who bought them yesterday why theirs doesn't work, when "The App Clearly states that FL Res tickets may work! I want a ticket that works with the new FP+ system now! And I won't have a magical day until I do!".
And that same logic goes as to why both passes will simultaneously exist. Since the terms do say that once you switch to FP+ you cannot use normal FP, they are pretty clearly slowly switching everyone to the new system. Then when they get to whatever pre determined saturation point, they will then shut off the old FP system, and deal with people who still have say old Non Expire tickets on a case by case basis.
And since the system appears to be operating under a tiered distribution method, with earlier dates for on site guests, people who decide to go day of, using the ticket types you mentioned, may very well end up only being able to get less desirable FP+. However, under your thought process, the only people who should get the maximum amount of FP+ would be those guests who bought single day tickets. As everything else comes in at a discounted per day price. So if you bought a 10 day ticket, that was added to your KTTW card, and you only ended up paying ~$40 per day, does that mean you should get less than half the FP+ entitlements as someone who paid ~$90 for a single day ticket? Or what about APs? Their cost per day changes every time they use their AP. So who/how do we determine the number of entitlements they get there? Long story short, you can't. Best bet is to make it as equal as possible with regards to tickets. Now if they choose to grant additional FP+ entitlements based on the resort you stay at, or your merchandise/food spend, so be it. But those should be add ons to the base number of FP+ per park visit.
