I'm not sure if it is possible to max out your stats on the ability screen, because I have mine at:
Agility: 100/80/100
Intelligence: 100/100/90
Dexterity: 100/100/90
Charisma:90/100/100
And I think I finished my skill tree .3.
I honestly loved the ending, and I believe that is was based on losing someone you love, without even realizing they were going to be gone, so you acted normally, unaware of what was to come.
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I like your interpretation. I'm glad you enjoyed it. Thanks for playing.