I don't have any trouble with the tier 7 suggestion. It won't still affect anyone for some time. Even if you could no longer lose ranks, it still would very seldom kick in.
Vanor said:
Yes, but in a RPG the point of the game is to have fun, if people aren't having fun, then someone is doing something wrong. It seems to me that a lot of people feel they could have more fun in YB then they currently are.
Just as I don't launch ordinary kobolds at 10th level characters, just as I would consider a DM doing this a very poor one, I fully expect a sizeable portion of my character's destiny to be out of my control. Would you demand to automatically pass all saves that would kill your character, or to be immune to domination, or to reroll on the Reincarnation table until you get the same race you were before? You wouldn't be happy playing Call of Cthulhu, I guess.

The fun lies in facing challenges - both fighting challenges (you lose a rank if you lose), and roleplaying challenges (you turn to Yakuza if you lose).
I don't see tier advancement as being a prerequisite to roleplaying enjoyment. The old Kerall had a good IC thread and many IC bits in every fight he was in, and I got a few compliments for the last plot twist - and, more importantly, I had some real fun. But he never got past Gang Boss 0. And in the last few fights, I've actually arranged things so that he would almost certainly lose and become Dirty Bastard 0 again before the reset, so that I could have the rules backing me when I stated that something terrible would happen to him on another loss. Advancement is fun in the sense it allows the character to evolve and thus gives a roleplaying opportunity. But it is just
one way to evolve,
one opportunity, among many others that impossibility to lose would destroy. Not all characters are heroes that always win and can only get more powerful.
Anyway, this seems to be one of those totally subjective things. I think you should post a poll to find out the general consensus. I recommend, don't just place "yes" or "no", give a few options and place a suggestion to read this thread too, so that people can see the different POVs.