I think it is silly to automatically assume that you won't be able to get a fastpass for TSM any day you want, especially at 60 days out..this is not based on any facts...it is just to scare people.
The assumption that you WILL be able to get a FP+ for TSMM any day you want is confusing to me

Under the current FP system my experience has been that ALL FPs for TSMM are more often than not totally gone for the entire day by early afternoon - many times by noon. In order to do that every person had to get up, get dressed, feed their family breakfast, get into HS and stand in the (dreaded

) FP line for TSMM within the first 3 hours of the day.
I can't help but wonder how quickly will those FP+ be gone for the entire day when all anyone has to do (probably prompted by Disney for those with on-site stays or packages) 60 days in advance is go on line and book it??
No dressing, no schlepping to the park, no FP line - just log in and hit the button - who the heck WON"T do it???

Add the +10 option and I can't believe that wont seriously reduce what's available at the 60 day point (it has certainly affected ADRs and DVC bookings since they've put it in effect there).
And while I'm wondering, does anyone else dislike the possibility that they may withhold FP+ for same day, thus limiting the 60 day offerings even further? I am feeling pretty disenchanted at the thought of adapting to the new system by planning my park days and ride times (which I really, really, really do NOT want to do) and then not be able to get my preferred FP+s when I go on-line because they are holding some aside for people who don't go on-line and plan at 60 days?
I know I would not be happy to find out that I could not get a coveted ADR on-line no matter how many times I tried when planning my vaca only to find out that they withheld some of those ADRs to offer to people same day (this is total conjecture/example, not fact)

- well it is a fact that I went on-line at o-darkhundred at 180+10 days for my BOG ADR for DGrDs B'day dinner and was not able to get the times I wanted - and daily checking has still not turned one up- and we're talking the last week of Aug - hardly a super busy time.
I'll say it again because I believe in dreams and magic - I would love it if the FP+ system opened each day at some time before park opening and we could book all our FP+ for the day at that time - but talk about system crash!!