The question of the scene is how players actually make money. At least since WCS shut down, players were already making their money overwhelmingly off of a good circuit of grassroots events, with some mix of streaming and youtube being a very distant second: they still will be. Losing EWC is a blow, and we'll probably see a few retirements (esp of players who were already on the edge), but I'm not really sure how this changes the main health of the scene drastically. We won't draw in new viewers through EWC, but I'd be surprised if a lot of viewers would stop watching because of that?
Anyway, time for Microsoft to step in and do their thing obviously.