What can I say? So far my 'buy the 2nd version' rule has been working for me. Over the last few years I've been far more likely to say "glad I waited" rather than "wish I had waited".I really don’t understand that reasoning, the first Air was better than the previous iPad, so even if the Air 2 fixed something you had a better device until the Air 2 came out.
Any product can have problems they fix for the next iteration but in most cases the product is still better than what was available before. So in any case you had a better device until the next iteration came out that you could switch to.