Hi there,
To join the discussion, I personally don’t care too much about the features of new versions, up to now I can do anything I need with my present version, BUT…
I think security updates are a must. And considering the strange behavior of google described in the link below, I think something has to be done. Not providing any chance to get security updates for a OS which is widely used by phones which are still sold right now is a no-go. I know Fairphone is a rather small project, but the idea of the project is putting pressure on the big players in the business regarding fair conditions during the hardware manufacturing. The same thing could (and should) be done regarding the software. Since putting pressure on google itself might be more difficult than supporting some third party developers, I assume pushing CM-development is the way to go. I am not skilled enough to contribute code myself, but I will happily donate something if that is of any help.