long time i didnt play the game so i started a new game i remember buying from stone guy in the pub but now he just stare at me without selling stones how i buy stone from him like before?

also in my old game i remember using sandra to steal from bosses stats power up items and skill stones but now she dont steal those things anymore

The event about repairing the old barracks was changed. You make the repairs on the country overview map now. Talk with Sir Edward to enter the overview map. 

I don't think that power up items or skill stones were ever available from pickpocketing. Both are items that are only available in a limited amount, and I don't intent to change that.