Rogue's can't read scrolls?Also I'd like to point out that all these issues are about magic, no martial class has the ability to completely restructure what the game is about, and most of the suggested counters are about magic too. So the end game is about mages warping reality and the other mages devising magical countermeasures. Might make the martials feel a bit like sidekicks, no?
Case in point. To be an effective assassin, a rogue will not do, you actually need to be a caster.
See, here's what I don't understand: why are we trying to pretend the characters don't live in a magical world full of demi-god level characters who can warp reality, change shape, turn invisible, wrestle giants or slay dragons? Why are we trying to demand that an episode of Murder She Wrote be a viable experience in such a setting?
But I'll bite. So the 5 hp noble gets ganked in his sleep and the high level PCs are called in to help find the killer. What are they going to do? Raise him and ask him who killed him? How would he know. he was sleeping at the time. "Who are your enemies?" Here's a list of 100 of them -- he's a noble. Their level doesn't mean they can snap their fingers and solve the mystery.