There will be no collaboration between Classic and Core - Core's objectives will never align with Classic. There was plenty of opportunity to reach agreement, but I think we are well past that now. The community will be offered an alternative to Core, with an alternative roadmap for segwit-like functionality, and it will be a free choice to run with it or run with Core.
Thats what bitcoin was always about. If you dont like what one product does, you can fork off to another.
You think its a good idea to alienate 45 developers and replace them with 5? Even if half of those core devs start contributing towards classic eventually that will be a huge loss for our community ... all in the name of what? Bitterness? Hopefully both groups can move beyond this for the sake of everyone,.
https://www.youtube.com/watch?v=FIt7GLxxIpY