@squidlings - Can you please stop calling it a "unforseen flaw" ? It's like that by design - The one time sig is based on winternitz signatures -

https://www.reddit.com/r/Iota/comments/6vj0fh/iota_wallet_sending/

https://en.wikipedia.org/wiki/Lamport_signature

Reason being it makes it Quantum Computing resistance, I'm guessing you haven't done much research on iota..