I'm saying low skill DCs and low monster skill bonuses is a real problem.Hardly a small number of builds... Just about every rogue and most bards, and many archetypes that grant double proficiency. They are trivializing higher checks as well, also making it very difficult and rare for monsters to challenge them--which removes some of the fun IMO. It isn't just that the floor is raised, the average and ceilings are raised as well.
But this isn't the case either, at least not to the extent you are implying. Of course, I like to think you are expounding for emphasis more than truly believe this to that extreme.
I am also saying I think Expertise is much less problematic than it initially appears: so what if the Rogue can detect traps and find secret doors automatically. You want and need that part to happen anyway.
Besides, imo Rogues pay a steep price in their fragility and decidedly mediocre DPS, so taking away some minor skill ability (all skill-related abilities are minor) is not on the table.
If the Rogue were to be elevated into a true glass cannon, say by being allowed two Sneak Attacks each round, then maybe, just maybe, I could discuss toning down Expertise (and Reliable Talent).