Hilarious things you've found in RAW?

[Vaern]

The flying weapon can clearly attack on its own ("A flying weapon follows orders subject to the limits of its ability (it has no Intelligence) but can be ordered to guard a location just as an animated skeleton can."
...
Why is it a problem that something "treated as an animated object except it has HP and Hardness as a regular weapon"

I'd just like to point out that, by treating a weapon as an animate object except for its HP, flying is an altogether terrible property to dump on an otherwise strong item.
As far as I can tell, animated objects only get a slam attack based on their size. Rug-like objects can blind and rope-like objects can constrict, but as far as I can tell there's no special attack for blunt or bladed objects allowing them to make weapon attacks.
Any reasonable DM is going to say a +1 flaming flying great sword is going to deal 2d6+1 slashing + 1d6 fire, but RAW as an animated object it'd just gets a 1d4 slam attack.