I do not understand one thing. Why do you see Preservation as static and not wanting change ? Isn't preservation also for life ? What does it want to preserve ? Why do you think it want to preserve things in a static way ? Don't we talk about life preservation ? If so, life is also movement but not ruin.
Ruin is suppose to be opposite to Preservation. If that is so, you are saying that ruin is change... I really don't see change as a mean of ruin, though, or why would ruin be so dramatic ? To me ruin equals destruction, pretty much what Vin felt at the Well's spirit. And preservation means to preserve life by all means whatever the cost.
A picture of this would be the mistwraight that eat dead stuff just to make it "similarly" live in them again, Kandra eat dead corpse and give them a second life, the Mist Spirit intends and makes Elend stronger in making him a Mistborn, the snapping is also a mean of preservation since it does give a second life to those who snapped, etc.
On the opposite, lives have to be taken to create an inquisitor, they do not continue in any other way. We do see quite clearly and in plain sight that inquisitors are there to destroy (Vin's mom who killed her sister, Zane who was told to kill everybody - but Vin, Marsh that had to kill Sazed, etc...) and not to preserve anything except the power of the evil that was hiding in the Well.
We know that the Lord Ruler touched only one power, Ruin OR Preservation. Most of you guys believe he touched Preservation because of its disgust of change, but what is static is bound to deteriorate and at the end, die. If you do not go forward, you go backward. If you do not progress, you go reverse. Life is not static and somehow, I do not see it as Ruin either. Life is movement. People grow older but bare their own seed before they die - that is life preservation, plants grow bigger and they bare their own seed before they die. Each go into multiple phase before they die. You cannot say that is static, and you cannot say that is destruction either.
If OreSeur/TenSoon thinks that TLR created the Kandra, he also stipulates that his memory doesn't go that far. No Kandra alive has seen the beginning of its race and like the Terris people, they have to believe what TLR wants them to believe. You have to remember that anything that was told by TLR cannot be trusted. It is not certain at all that he did create Kandras. It is just like him wanting to believe he is God and knows both powers, like Brandon says in his annotations. He did lie to people, and that could also be another one of those.
Let's not jump to conclusion to fast.
Qarlin, it is certainly a possiblity that the entity or spirit living and trapped in the Well could have been there by the will of Preservation. But this power, we have to remember as per Alendi's logbook and Vin's impression, is evil and wants destruction not because it's mean, but simply because it is all it aspires. In this case, the power would belong to Ruin. Remember, the power is sentient and devious.