This particular issue is being worked on right now in Riot, and should be fixed early in the new year.
If I could then this would be a minor inconvenience at best, I'd just copy/paste the key from the already-trusted device.
Cross-signing is obviously better, no question about that. However this simple UI change would be at least 95% as good, and certainly good enough to have prevented my friends from giving up on Riot.
I hope that is at least somewhat constructive. Thank you for your work.
I recognize this is a common attitude, but it makes no sense to me.
Some software you tried today isn't designed in a way you prefer, so you go back to using something else. Okay. Makes sense.
But to declare the whole project forever hopeless as if it can never be improved upon because the snapshot of your first experience with it was negative is truly irrational.
After all that they quickly come to realize that something simple like adding a new device is a massive pain in the ass.
It's not that they declare the whole project as forever hopeless, it's that they invested time and effort into trying it already and it turned out (for them) to be a waste.
It's just a bad taste left in the mouth. In order for them to try it again, they not only have to overcome their natural laziness/time constraints, but also the rather unpleasant memory of the last time.
Now, if it is obvious that something is a work in progress then I personally wont mind giving it a new shot.
It's a real shame. These are technical people who don't particularly mind verifying a key by hand. In fact I personally even prefer it.
The problem is not only that certain things are not done automatically, but that the UI is designed to make it difficult to do them even manually!
E.g., I have one device 'foo' which you already trust. I add a new device 'bar'. Why on earth would you want to verify its key manually when I could just send you the new key from 'foo' which you already trust?
Even worse, the key for 'bar' is not straightforwardly available anywhere in the UI on device 'foo'. It should be easily viewable in the right hand pane where the list of devices is, but it's not. The only way to get the device ID and key is to send a message from 'bar' to 'foo' and view the details of the message. Why?