Good read and resources. But like we said originally MTProto is not really suitable even with all FakeTLS on top of it, because Telegram team abandoned the protocol and haven't update it since 2018.
DPI vendors most likely have found the way to block it and now are slowly rolling out the updates. We are monitoring the situation and looking what additional tweaks can be done, however there is not much hope so far.
I would say it's now more up to Telegram team to help MTProto/MTG and related projects that help make it usable, but it seems like they don't care at all.
I agree that they really don't care about mtproto. They have enormous potential, but they don't do it.
Just as they won't build a mesh network of devices with Telegram installed. Because that would be a threat to the authorities not only in Russia but in other countries as well.