What's the point of keeping legacy? If some services are still not compatible with Bech32 then Nested should work just fine. Your GUI edit looks pretty good but it would confuse newbies which probably don't see any difference between these three types of addresses. Don't you think that there should be a short description of every type of address? I guess that Bech32 won't be a standard wallet because some services still have problem with this type of address.
What's the point of not keeping it? Some people will only accept legacy payments and they have they right to do so, and people have their right to use legacy at any time.
It would not be any more confusing than having that "Generate Bech32 address" button which already exists there.
And like I said, this could be hidden by default and shown if you enable advanced features on the menu.
In any case, noobs in general don't use full nodes. Anyone using a full node knows what that is anyway.