One thing to add..Disney also wants to find ways to maybe offsite people change and become onsite people...this way they get their park admission plus the hotel stays, and most likely more of their food bill will be paid to Disney.
I could see there being an advantage added with the new system to give an additional perk to onsite guests. Not saying a mod would get more than a value, just in general onsite would get more then offsite when it comes to FP+. I would think that would be a no-brainer...maybe allow park hopping reservations or allow additional FP for onsite. We won't know till the system is live, and also it might not be something that is activated right away...maybe in stages...
This is an example:
When FP+ becomes live, all guests get X number per day...
During slow seasons or times when there is a greater % of offsite guests expected...make it a promotion....stay onsite between certain dates and we will double your number of FP+ reservations! For some people, that could convince them to go onsite if there is a perceived value. What do you think?
Or maybe after it's been operational for awhile and the wrinkles seem to be ironed out, increase the amount of FP+ available to onsite guests, and advertise it as a bonus reason for staying onsite.
This new tech should be flexible enough to be able to handle that.
Depends on this formula.
Number of offsite guests who would stay onsite because of more fp = A (where A is the money gained)
Number of offsite guests going but spending less as they wait longer = B (where B is money lost)
Number of offsite guests who are turned off by this choosing to go elsewhere for a day or two or not purchasing tickets full stop = C (where C is money lost from people )
If: A > (B+C), I can see them giving a lot more perks to onsite guests. If not, it wouldn't make economic sense.
There has been nothing, repeat NOTHING official to my knowledge stating that onsite guests get anything more than the band for photo pass, a room key and as additional functions like paying for items, and offsite can purchase a band anyway and take part in the full mymagic+ if they wish. (Search for the Tom staggs blog post officially announcing mymagic+, in it he replies to a comment with this fact.)
I find it unlikely onsite will get more fastpasses, but if they do they will most likely have it as a band feature. Since offsite will have the opportunity to purchase a band if they wish, they could opt in anyway for a fee, which I doubt would be very high if they want people to upgrade and spend more money. (I saw very few offsite people buying universals pass for example, which is limited in number anyway.) Not that much of an enticement in that case, unless like universal they price the band so high or make it so limited in availability no offsite guest will choose to purchase one but rather be forced choose to stay onsite to get one. Again, I find this unlikely if they want to appear better than universal and not send out the wrong image.
In that blog post he mentions customising your vacation using the band. I think this will be the hook for onsite, not more fastpasses. "Not only do you get fastpass+ you get this special service where you can make the vacation your own!" How... I don't really know exactly. I remember personalised greetings, ride endings and other things being mentioned early on in mymagic+. Didn't et at universal do that? No reason they couldn't do it now.
Sounds better than "you get the same as offsite (fastpass+) but more" but more importantly doesn't leave one group waiting in standby longer, so gets both offsite AND onsite spending more in park as opposed to prioritising onsite guests while damaging offsite guests spending. Win win for disney. Perceived value for onsite increasing appeal to stay at disney whilst delivering increased revenue from BOTH camps.
EDIT: Blog article link
http://disneyparks.disney.go.com/blog/2013/01/taking-the-disney-guest-experience-to-the-next-level/