I think the sutta’s are very clear that the arahant has uprooted all anusaya, asava, tanha, kilesa, so the kinds of vinnana’s in which those were formerly incorporated do not arise anymore. In me such vinnana’s arise still, in which such emotions or passions are incorporated. In an arahant this does not happen.
So, even from the sutta’s, it is very clear that an arahant has a certain kind of vinnana, i.e. only the sensing-vinnana, , but has also lost the vinnana’s in which reactive forces are incorporated such as lobha and dosa (these are called kamma-vinnana’s in Abhidhamma).
Those vinnana’s with incorporated emotions are kammic seeds and those seeds build up in way that when one feeds those kinds of vinnana’s, for example, feeds the vinnana in which hate is incorporated, the kammic seeds of a vinnana loaded with the energy of hate, builds up and becomes stronger and stronger. Such strong kamma seeds can even lead to rebirth in lower realms. I have learned that only these kinds of vinnana play a role in rebirth and not sense-vinnana’s.
When one feeds a kamma-vinnana, for example, the vinnana loaded with hate, and make this vinnana very strong, then such a kamma-vinnana can suddenly come to mind, and at once one is full of anger.
There is immediately an explosive situation. That is what strong kamma seeds mean. The situation becomes intensely loaded.
I belief things often can be interpretated over many lives and in one live. For example, one can think of birth in this life and also over many lives. The same with death. I also belief this is the crux of Buddha-Dhamma. In this live we can, for example, mentally take birth often as an animal when we become quickly agressive. If this becomes a habit, a strong habit in our lives, (a strong kamma seed) it can even lead to birth as an animal after death.
This relationship between how we mentally take birth in our current lives here and now, and rebirth is what Paticca Samuppada descibes . This relationship was seen by the Buddha while awaking. For example he saw that when people embrace the practise of living like a cow or dog and develop all their habits and mentallities, then they are reborn as cow and dog. That is because they mentally live as human as a cow and dog. They take birth as cow and dog constantly in this live. (MN57)
If one takes mentally birth as a deva, i.e. when one in this body takes often and quickly birth in a loving and caring way, friendly, warm-hearted, then one has a strong kamma seed for birth in deva realm after death. Etc. This is what PS describes. It describes, in very short, that what we feed now, becomes our future. Feeding means building up. Building up hateful vinnana, building up loving vinnana, builing up greed vinnana etc.
So, how we live now, the choices we make now, the dominant habits we have now, what we develop now, the way we take mentally birth in this live now, that can be a designator for the kind of rebirth we can expact.