There have been constant improvements since 1.0, the latest version is 2.1, see here: https://support.remarkable.com/hc/en-us/articles/36000236337...

- Search was fixed in 1.5

- USB is still not a drive, but there's the web UI and also third-party apps.

- Zoom: Not sure what you mean, but rasterization was fixed/removed in 1.6.