Honestly, Keystore is targeting newer users. Keychain offers superior security and more access to Hive apps, so I wouldn't say to ditch Keychain for Keystore by any matter of speaking (if anything, it'd be the reverse - Keystore users should trend toward being Keychain users over time).

Keystore is a more traditional crypto wallet method. It's basically a "paper wallet" and will give you a BTC wallet, ETH wallet, Dash wallet, etc.

What INLEO has done here is made it give you a Hive wallet too. So when a new user signs up for a Keystore, they get a bunch of crypto wallets as a single file + seed phrase

What specific issues do you have with Keychain? Perhaps there's a way to address them