Here’s my take on the old thief-acrobat… updated. My thought is that it may appeal to newer-edition d20 players who want a bit more mobility and ‘swashbuckle’ added to their thiefly class.
I wrote a similar version for C&C a long time ago. This is updated and converted using the ACKS class-building guidelines. Additionally, I added 250 xp to the class progression in the build due to the thrown weapon ability, which technically is a fighting value ability. Like the mountebank, I think it’s more suitable in city-oriented campaign.