This pretty much confirms it.
I think for other spin-offs we should make our own threads.
Already did that for early modern:
Spin-off that fills the gap between AoE2 and AoE3
Or talk about which mods could be turned into official content:
Adding content from Age of Chivalry: Hegemony to AoE 2 DE
What did they tell you?
If someone works on a free mod project as a hobby and they are passionate about the subject they likely have more then enough ideas internally that they want to do and not enough time to do even a fraction of them.
Not that they are making a living out of it they should be more interested into making what the players want. Or at least someone in the company should tell them to listen to the players.