1. yep
2. Mostly it will affect for transmittion power, reception power depends on your hotspot power, so signal level may stay the same in all range of tx power setting.
3... better ask pengus
4. should affect only to usb charge, when it on, device thinks that it connected to wallcharger always (i think so)
1. Agreed. When you turn hotspot on it will work in power safe mode (Fast PSP) instead of full power mode (CAM).
2. Just perfect
3. It will set your sleep policy in Max PSP, pretty much as the "psp" module used to do. So you can test right away if your router supports it or not without flashing anything
4. Yep, perfect, and will also disable adb while it's on, because it simulates an AC connection and when on charger adb and mass storage are not really needed, right ?