I agreed with all that you have said until I tripped over Juggluco. It is on the Google Play Store, so a small degree of peace of mind. It runs alongside LibreLink; I sttill use LL to record carbs, insulin, etc and it gets automatically uploaded to LV just as normal. Obviously you still have to scan as that is the only way LL gets the data. Meanwhile the Juggluco app sucks up all the alarm messages (one a minute) screams at you if you go high/low, displays the reading and does a few other things including a very nice if untidy graph as there is no 'smoothing'. I find this extremely useful. In the past I was prone to over reacting to readings and eating or injecting when not really required, getting into the yo-yo cycle. Now I can see exactly minute by minute the quite wild fluctuations that seem to occur even when 'running normally' and get a much better feel for things.
Oh, you can also see that when you scan the other app is showing exactly the same (well possibly 0.1 out depending if you scan/look over a minute boundary).
I'm impressed. Not just with this particular app but the functionality. I never really thought there would be any advantage unless 'closed looping', but it is another example of the benefit of good data.
For clarity, this is Libre 2 and NO bulky add-ons.
I do look forward to the smaller L3 and probably will be happy with the one official app.
FWIW I have emailed Abbott and asked why they don't just display the alarm data in the L2 app. Had a standard 'thank you' and nothing else. Just 10 minute amendment I reckon, just stick it up on the notification line for 10 seconds or something. Ah well:-(