The two weeks are only for sharing across accounts in a family, if you’re using the same account across two devices there isn’t a time limit. You could already play your games on both but before the secondary device needed to connect to the Internet every time you launched the game, and now it’s just when loading.

There are games that perform poorly, but to my understanding that’s not the hardware’s fault

Because they don’t want to give people healthcare. They can do both, they choose not to.