Ecash is interesting but arguably more for its ability to work offline and some unique approaches to privacy. But also like Lightning, scaling isn't just spacial. Executing faster is temporal scaling and frankly in many cases seems at least as important, especially right now. Keys are all well and good but if you're querying the network with an untrustworthy node (ie, one that isn't yours) a lot breaks down. When you and your payee see different data, what settles the disagreement? As for indications soon, no. The arguments if anything are to shrink blocks or otherwise remove the segwit discount. Also concerns that with block space in such low demand we may need to explore ways to keep miners incentivized. If there's any reason to expand blockspace it'll be far off in the future.