I did use it, and my experience is the same I agree, but it's a UX issue that I think a well-funded company like Signal has a better chance of solving than Zeus. Also, even if the node is not running in the app and Signal runs it, it is way better because it cannot be rugged, although you sacrifice absolute privacy, so there are trade-offs. There is no one-size-fits-all solution; in an ideal world, we would have both Lightning and Cashu on Signal.