We can keep an eye out for text wrapping on buttons. That’s up to the Bubble team!
As far as element “libraries”, this is exactly the aim of future plugin marketplace capability. I believe users will soon be able to create element/workflow plugins, which would cover this scenario of giving other users a shortcut and not having to reinvent the wheel every time for common features.
I guess there’s also something to be said for Bubble keeping things less pre-built and more open to your own customization as that’s what makes this platform so valuable to me. You make a fair argument for the signup template not including things like log in button visibility when current user is logged in though.