Thanks for the feedback.
I don't know about other teams' plans, but yes, I think that could be a good move. I worry a bit that it'd be over-whelming to have e.g. ten weekly public meetings, though – if I'm a volunteer and interested in a bunch of different things, do I just have to pick the ones I can do? If they're rotating the times at which they're occurring, who gets to go first, etc.?
Echo, MobileFrontend per se (it's complicated) and CirrusSearch aren't active under development currently (just maintenance), but Flow certainly is – for that, you should ask User:DHorn (WMF).
Other user-facing projects underway which might want to do this are:
There's also Wikidata itself, led by User:Lydia Pintscher (WMDE), and several less user-facing projects – the Wikidata Query Service, front-end standardisation work, the continuous integration workstream, the general Platform backlog and several others.