3) sometimes I question why making one choice is classified as "romantic" while it sounds more like "altruistic" to me
Anyways most traits have several conversation opportunities so you can always correct your choices. Eg whether you have 1 point into practical or 30, you are still only going to get 1 bonus for crafting.
4) with the option to brute force most locks with no consequences, I agree that the lock picking is rather depreciated in the game