If the EMH is in the evening, then it would seem the FP+ system wouldn't be necessary, or would have run out of available FPs for the day. And the same can be argued in part for the morning hours, as the FP+ is supposedly tied into the park schedule. As you said, this is a perk for those staying on-site, so it shouldn't impact those staying off-site.I disagree, I think that two hours at night or an hour in the morning can be MORE of an extra access to rides that FP+, depending on how you use it. Just because YOU don't value it, doesn't mean that others don't.
And I'm sorry, but where did I say I didn't value EMH? I simply don't believe it should negatively impact those staying offsite vis a vis the FP+ system.