One deal-breaker, though: RRP = 550 Euros.

The problem that games like this have is making the level (and each point along the level) “acceptably hard”, where the player can do it but doesn’t have to spend 10 lives on it and get intensly frustrated.

The “help” I hate most is computer controlled team members that do things like:
a) Block your path through doorways
b) Shoot hostages by accident
c) Are careless with they various grenades
d) Don’t shoot the enemy quickly/accurately enough
and the worst one (But least common):
c) Shoot you in the back by accident whenever you try to lead the way into enemy territory
Of course it is one of those areas where you won’t notice the times when the AI saves you, but each fault will be glaringly obvious and you will feel like you could do a better job by yourself (Although the stats would probably prove otherwise).

The other annoying thing is useless/”already adequate, thanks” powerups, especially in Quake/UT when you already have 100% health and all you can find is health when invisibility/rocket launcher or a 200% shield would be nicer.

The problem I’ve had in the past is that the game helps in an entirely useless fashion. Jak 2 and Jak 3 made enemies visibly weaker and more stupid… but almost every frustrating point involved a timer, falling into a pit, or both.