That is a good point about death stopping you from doing anything that session. But yeah I really hate death even being an option. That is why in my current campaign I run, all the players became unwilling technically liches in the first session. They get to enjoy not dying when they are killed, but the godlike creature who've done it is literally holding their souls in his hand :)
If they mechanically die or do something particularly stupid, I will probably just introduce forced flaws.