1. If I download the current PTE and install mods through the CMM will they all be removed if a new update is added to PTE or if the PTE changes come to the main game? 2. If I download the PTE will I be able to play games normally (games against people without PTE / ranked etc.)? Couldn't find the answers so thanks in advance.
The list of installed community mods and cached downloads are saved like other settings in your PA data directory which is separate from your PA installation. ie nothing will be lost when you upgrade to a newer PTE or next stable. You can play stable games using the PTE by changing version.txt to 89755. Some new features like chat lobby history, custom commanders, etc are only available on PTE servers.