I am going to stay with old one.I think it is enough to use old version But best is to write to his support
notify about bugs or tweet
yes, we should stick to the old version until it becomes stable.
I am taking the same approach and staying with the legacy/old wallet for now.
I think the problems are coming from people who upgrade and then decide they dont like it and want to downgrade to the legacy wallet which it seems you cant do.
You could sign up for a new legacy wallet and send your BTC back to it but eventually everyone will have to upgrade.