Disappointed. Really do not understand what happened....
The export is off
CocoonJS being a working solution short term wise, but having a really bad support and resulting on a bad popularity on C2 since ludei did not do their job correctly either in giving a valid changelog for scirra to adapt C2, or just plain refusing to maintain the cocoonJS plugin while rendering it open source to not look bad.
CocoonJS was not listening, and scirra could not support the users using it since ludei did not seem to care anyway, at the end people were dissapointed due to incompatibility and long term breaking changes issues.
This decision is more an officialisation of what was already the situation, and did not come like a surprise to anyone following this situation, even crosswalk became an official export to go against using cocoonJS, but People kept using it, now it is officially off, you can still use it, but I would never ever recommand anyone starting off a new projec with it.