Perhaps they lack the significance to you as an individual, but they have it to
The ToO, the entity, which is what the flag is for. Personal taste doesn't change the fact that those are the ToO colors. They just are. The bison has no particular significance to me as a person; it's still the new national mammal.
I'm not saying those colors would look unbelievably amazing (though I do actually think it looks quite nice, depending on the shade) the point is every element of a flag, not the least of which including the color choices, generally has a meaning to it. If we follow that model, those are the only options we arrive at. It's just how it is.
If we collectively determine it's acceptable to just use arbitrary coloring then it is what it is, but that seems like a really pointless waste of opportunity to me when there is an obvious chance to add the additional symbolism. Just my thinking, others can not care about going so far, but for me if we're bothering to do this we should go all the way.
Which leaves me stuck in how to vote in the poll, because though my opinion is "Yes we should change colors" it is a binary relation to "Change to purple and orange". If we aren't doing that, I say it should stay as it is because blue is neutral. If we're not going to change the colors to have inherent meaning, we likewise shouldn't be changing them to ostentatious shades for no reason.
And this is a bit of a tangent, but you've made that statement multiple times in the past and I've never understood it so may as well go there since it's brought up again: How do they "look dated"? They're colors. Colors don't convey age. (Except maybe black and white
)