What are bad ideas in RPGs?

[Andor]

No, it's not. That life is short and combat deadly is the point - but the low success chances apply to either side of that - the enemies fail their attacks, parries or dodge rolls just as much as the PCs.

I think this might really be fundamentally bad design (as much as I like Warhammer), because IIRC, research has shown that there is a "comfortable" area of success and failure rates, which means in a game like Warhammer players will probably feel uncomfortable with their results most of the time. And this doesn't reflect back on their character being uncomfortable or feeling inadequate (that might be okay), it reflects bad on the system and might lead to disinterest.

Meh. They tend to get out of the zone of incompetance fairly quickly. The first few hundred xp are enough to significantly improve performance. I've run a WHFRP campaign a couple of times and the PCs are in good shape after a few sessions and kicking ass and taking names after the first 1200 xp or so.