I agree that there's nothing strange or outlandish, but it's very easy to assemble a bass that's not available anywhere BUT through the ADE.
An LPB classic precision with a pearloid pickguard, BA style bridge, 58 pickups and jazz neck with blocks is a fairly unique combination... the simple fact that not a ton of them exist and you get a COA from Fender to verify it came from their factory that way adds to the collectibility somewhat.
I happen to love Antigua, but I agree that Fender enthusiasts are freaky about collectibility and originality, even if it is ugly... an all-original bass that has any kind if custom factor to it adds to that mystique that makes some collectors' mouths water.
See, those specs to me say that the ADE will be worth what an Am Std is on the used market. If you were to build the same thing, even if out of American parts yourself, you'd be much lower in price because it wasn't built that way. The CoA is the only thing that will leave it at the Am Std used resale value.