Fast travel can cheese it, but this always works and feels more realistic. It's basically the same mechanism as in Larian's previous DOS2 game, although that had a one-time pickpocket restriction per merchant. and per party member. They should bring that back.
That would be just a band-aid solution to a mechanism which is more an exploit than a feature in Larian games. I feel Larian should do more to balance pickpocketing becoming the easiest way to get rich/powerful fast. Once you understand how the system works, you are pretty much guaranteed success. Besides, success is just a single save scum away.
I'm hoping for more roleplaying moral dilemmas where you can obtain ill-gotten goods, rather than a simple gameplay mechanic. I'm hoping for a hidden reputation system a bit like in the original games. If things start being stolen/disappearing when the party arrives in an area - all of them will be under suspicion even if there is no direct proof. Social skill checks should be made more difficult. Stolen items, depending on rarity, should always have a chance to be recognized when equipped on a companion. I want the possibility a friggin' Flaming Fist squad spawning yelling "I AM THE LAW!" as it proceeds to arrest or attack you or a "crime hunter" squad who investigate larger thefts and where possibly innocents are falsely accused/arrested. Anything but a quick and easy way to be more rich and more powerful as Larian usually opts for.