Ace, you have had suicide as your theory and were quite adamant about it. Have you changed your position?
Not really. I still think it is a good fit. However, until it is ruled out, I think playing Pokemon Go is a better fit. I know it sounds crazy, but it is just such a good fit.
Every theory has problems. The Pokemon Go theory has only one big problem: motivation. What might have motivated her to play that morning and head to Parkville to do so? There's really only one possible answer: she wanted new types of Pokemon. That does seem far-fetched but you never know. I can imagine some circumstances where that could be the case.
A minor problem for the suicide theory is that she still had her phone with her, and on. I feel she would have tossed it, or at least turned it off.
The total accident theory is preposterous, imho. There's no way she was in the park because she was lost.
And any theory involving foul play has a huge problem: the police saying all along that there are no signs of foul play. If the cause of death comes back as drowning, which I think we can reasonably expect, that all but shuts the door. We do already know, via the family, that there was no trauma to her body. The vast majority of murders involve a bullet, knife, or beating. Also, defensive wounds.
Toxicology results are going to be interesting, no matter what they are.