
IP bans will be reconsidered on a case-by-case basis if you were running a bot and did not understand the consequences, but typically not for spamming, hacking, or other abuse. If you are responsible for one of the above issues.

If your housecarl, or any other follower for that matter dies in earnest, then they are gone forever (discounting console voodoo).

The only thing that changes when you make a follower a steward is where they hang out when they stop following you. They also still work as followers: you can still ask them to follow you again, marry them, etc. None of the characters make a “better” steward they all behave exactly the same in that role. Once a steward has been chosen, they cannot be dismissed unless they die however, they can be moved to a different homestead by recruiting them as a follower, then following the same recruitment procedure at the new homestead. Yes she can, all companions can die, but when they take a knee usually the enemy will go after you. You might be interested: Often asked: How can the motion of particles in a solid be described? Can Lydia die forever Skyrim?
