I didn't suggest getting a message. I don't see why there would not be a way of doing this without a lag. The client already receives the information who donated what, except it disappears after a couple of seconds, so why not store that information for later viewing?
That's exactly what we want to do in our clan, except we can't see who donated those troops because the information is only visible for a couple of seconds and then disappears forever.
That depends on the clan. In our clan we encourage low level players to focus on upgrading (not "sitting back") rather than wasting precious resources on pointless donating that doesn't help higher level players.
Sorry, English is not my first language, so I don't know what you mean.
Sorry, I did search, but couldn't find this idea already suggested anywhere

