There were long 'discussions' about this on Facebook. The organizators of MKM Series claimed many things from Wizards not allowing them to get premier status, low attendance (true), that they were losing money or that Wizards is pushing them into Limited.
(getting 1 point from the Vintage and Legacy events felt really, really bad. Thanks to that I don't have enough points for another season)
I may have not organized a very big event like this yet, but all what they claimed as reasons to drop Vintage are things they could have just simply fixed instead of using that as an excuse (that's how it feels to me). Getting premier status for an event is not actually that difficult, the problem comes when Trials are involved because those have to be set in advance. That requires time and also more will from the LGS that would want to run them.
Vintage is dropped as an main event and there will be a 4 round Challenge event instead.
I don't think that Vintage is dying in Europe there were more and more players, they just had a hard time attending events.
BoM is actually the reason why Vintage started to die in the first place because they were really doing events for their profit in a harmful way for the players instead of trying to find some kind of balance between profiting and also making the players happy. That's one of the reasons many players didn't go to the first EW. They lost their trust and that is something that is very difficult to earn back.
The last several MKM events were seriously bad in terms of everything. Events capped at the prizes' treshold for example is something that doesn't look good, especially if you know that the place actually could hold about 80+ players more and at least those that got byes for the event could be let in. If you want many 'funny' stories just talk to me and I'll tell you how it looked like in Germany and Czech Republic.
JK is starting their own series instead of doing MKM. So we'll see how that will go. I'm not really sure how many players will be willing to come for the Vintage events though.