I, honestly, think that this "announcement" was just an acknowledgement of the things that have already happened.
No MLP convention is, was, or can possibly be, absolutely 100% pony.
The fandom itself is a wonderful hodgepodge of so many different varieties of fans of the show!
Gamers! Movie buffs! Fans of other shows who also like MLP content! People who only barely like MLP content, but really and truly support their friends who do enjoy MLP! Folks who started out playing Magic: The Gathering and then discovered the MLP:CCG! Musicians who found another expression of their craft! Artists who found that creating MLP-related art was relaxing and enjoyable!
Even the staff of BronyCon has never been 100% Pony 100% of the time!
There are staff members who work the convention because they absolutely immersed themselves in the MLP show! Those who work it despite the MLP content, because they love being able to assist attendees! Folks who are only staffing because they have friends who said it's a great con to work for! People who don't really care about the content, but work at the convention because they have found a community within the staff who are incredibly supportive for their personal needs! There are people who work at the convention because it's convenient to their location and they don't have anything better to do (and at least they get to people watch)! There are people who volunteer for BronyCon because it's the only place where they are truly trusted to do the job, because other places judge their abilities based on their looks/age/attitude/physical disability/gender identity/sexuality/other issue!
And they are ALL integral parts of the volunteer staff of this amazing convention!
Even the actual panels have never been 100% Pony all the time!
Discussing disability issues? Not specifically a Pony thing.
How to create drawn artwork? Not specifically a Pony thing.
How to sew? Not specifically a Pony thing.
A panel to ask about Voice Acting (even with MLP VAs)? Not specifically a Pony thing.
Discussing how to handle bullying? Not specifically a Pony thing.
While BronyCon has always been a primarily MLP-Content-Related Convention, it's never been a MLP-Content-Only Convention.
And that is a wonderful thing!!!
The level of acceptance of Diversity has always been one of the reasons that I keep BronyCon at the top of my "Volunteer For This Convention" list.
This? This is just an acknowledgement of an absolute fact.
And I, for one, fully support the decision to bring this diversity into the light.