No, 1.2 and 1.3 were English patches after the 1.1 version initial release. The Larians would rather release patches as things were fixed or if common problems cropped up (to help the affected people as quickly as possible), rather than try to resolve everything first and just release one patch. Of course ideally you would want to deal with all known issues before release, and just have weird glitches, exploits or balancing issues to deal with in a patch.
The Lockpick skill was known to be broken before release. In earlier versions of the game there were no locked barrels, and very few locked chests that did not have a key, so this did not pose a serious problem (except to those wanting to play a thief type character).
I can not speak for Larian and do not know what was required to finish implementing and/or fix Lockpick, but presumably they kept a list of things needing to be finished, tested or fixed before release and prioritized them to devote resources to the most important ones first. After release of the demo and game they added some stuff based on feedback. As seemingly obvious as a broken skill is, it just took awhile before Lockpick rose to the top of the list of things to do.
