I've recently pushed some changes to TextPress, which includes upgradation to Slim framework 2. This version of framework got many new features such as PHP namespaces, PSR-2 compliance and so on. Please take a look at the Release notes to know more about this. This is still in development branch, which I will be merging to master very soon.
Going forward, I would like to add two important features to TextPress - caching and search support. Any suggestion, thoughts from your side will be greatly appreciated :)