How appropriate it would be for a) users b) owners and devs of Memrise to unearth the previous, old stable, battle-tested versions of iOS and Android apps as a new starting point for Decks?
I assume, if only leaders and devs would be willing, they would probably know which of the previous versions gave them the least pain - in that time. (of course it also depends how much did the underlying database did change meanwhile and how difficult it would be to/if roll-back such changes)
Maybe it would have the bonus of reintroducing back some features previous for community.
(But as for me, I would prioritize the easiness and cost-efficiency of launching such secondary app - just to ensure to have any at all)