What conclusion have you come to after following the arguments from the suttas you have quoted?!
My approach to karma, considering that it is one of the ‘imponderables’ in Buddhism:
-I might have performed innumerable good as well as unwholesome deeds. They may or may not average up to much AND there’s nothing to be gained from worrying about it, as what happened in the past is not within my power to go back in time and do differently! The Niganthas focused on this and it became the source from which their practice of austerity arose which created a substantial amount of suffering.
-If you wish to know your past kamma look at the good things in your life, AND the bad. If some good things come easy and some bad things keep happening repetitively, and they are getting weaker with time (as their ‘energy’ is expended) these maybe a sign that it is karma in action.
-karma is a force acting across a lifetime.
-karma arises at intention, and not action.
-Karmic intentions are wholesome if they arise from non-craving (eg: wisdom, neutral or a mind of metta), non-anger (eg: Brahmavihara, euthymic state) and non-ignorance (eg: mundane right view or ultimate right view) and vice versa. These lead to their corresponding actions and their effects might influence the severity of the karmic result, kamma vipaka. Ignorance in the first step of the DO leads to intentions which leads to consciousness. Karma is involved in determining rebirth. Shades of kamma creates a varied karmic picture in different people ‘s life -it’s not just ‘good AND bad’, it’s a mixture of these acting dynamically. EBTs suggest a place for genetics (seed), weather (elements) and states everything is NOT due to kamma. Individual will as a force affecting oneself (and others) is also inferred after all the entire Path is based on Right effort! Other principles such as impermanence and unsatisfactoriness can be seen to function concurrently. This has lead to these being summarised as ‘Niyama dhamma’.
-Keeping the five precepts will bring wealth etc and a country will come into prosperity. The Noble eightfold path will naturally generate the karma required for the necessary physical requirements and requisites of practice. Divine abodes generally give rise to a lot of wholesome karma. They can even lead to dissolution of bad kamma. Jhana give rise to powerful wholesome kamma. Insight permanently stops rebirth in unwholesome realms. Even human existence is a kind of grey kamma.