To answer to your second question, if you had to type your recovery phrases to use this service, it would be even worse than the current solution that they are proposing as you were violating one of the core rules of your funds safety - never share/type your recovery phrases anywhere, not even with your device manufacturer or the Pope.
At this point I believe the worst thing would be to find out that there is a way to extract the seed from the hard wallet, at least in my opinion.
The fact of making a user enter the seed would only be done according to the user and would not be a design flaw, but a "social" flaw, but for me it's still hard to believe that they actually already have this tool to extract the seed.
The Ledger I own is a nano S, which apparently will not be compatible with this technology, so theoretically I am protected
But I'm afraid of how things might escalate from here on out
Yesterday I saw this tweet:
SourceThe user claims that Ledger reportedly wrote a tweet saying that Ledger would create another backup phrase, and that no one would have access to seed, but that tweet was deleted.