it can't be improved.
I'm talking about the process. Yes the process can be improved upon from a HW wallet.
I'd argue that the process for a SeedSigner cannot be improved without adding memory to it. No one wants to add in 12 words each time they go to spend a few sats. The QR code makes it less secure, not more. HW should absolutely be able to remember your PrivKey to avoid these problems!
HW is awesome, I've been using them since the 1st ledger and KeepKey hit the market. I don't use those two any more, for obvious reasons, but the airgapped HW wallets we see today are all pretty awesome, and light years ahead of your process in terms of safety from all angles.
You need to go back and watch that Andreas Antonopoulos video from 2014 about why HW wallets fit in that sweet spot between protecting from outside threats and protecting against ourselves forgetting. (A far more realistic threat.) Seedsigner steps outside of that paradigm a bit.