I'm good with what they are saying now. I can just see them next year saying, "resale, sorry you can't get in the Merry Mixer!" or "oh, you can't book the Grand Villa, you'll have to wait until all the direct buyer have a chance!" I'm just thinking this is the tip of the iceberg. Even resale maynot get the EMH.
Any of these things, with the probable exception of discontinuing EMH only for resale buyers, are already possible for any
DVC owner regardless of how they purchased their points. Restricting attendance at merry mixers would be silly, and would serve no purpose for DVC. Restricting attendance to EMH would be a logistical nightmare for the CMs at the theme parks, and again, no advantage at all for DVC.
Preferential treatment for booking windows, etc, is possible, but if DVC follows the industry pattern they would increase the booking windows for owners of large contracts who purchase direct as part of a "tiered loyalty" system like they've been talking about. IF they did that, and if they followed their own precedent of grandfathering owners in, you would be included or not depending on how many points you own, not how you purchased them.
Any of those things are non-contractual perks and details of system usage that are not guaranteed to ANY owner. They could change them at any time, for any reason, for any or all owners with the stroke of a pen.
To evaluate possibilities like this, it is very important to know what you are actually guaranteed -- which is VERY little. Anything else can be changed, including many other aspects of DVC that would be much more serious losses than those you mention.