What if you only roll for skills when you are in a contest with another creature?
What if your "rank" of untrained, trained, expert, master, and legendary decided things that you can do and only moderately helped out with a skill contest?
3.X have us this idea that everything you can do with a skill should be decided by a roll or taking 10. But with the d20 as the base randomizer this can lead to unwieldy systems, tons of mods, and just wonky stuff overall. For example opening lock DCs have to assume everyone can take 20. You need at least a DC of 21 or higher to prevent anyone from being able to pick a lock.
Now let's say expert thievery let's you pick expert locks, but picking pockets is still an opposed roll. How do people feel about a system like that?