When did I say that they would be "Better on average"?
In your previous post and you are reiterating the same point in this one. I'm not sure how did you miss it.
You are explicitly suggesting that the baseline of "random drops" used as the backbone of the loot table should include +1, +2 and eventually +3 equipment.
I'm saying that I disagree and I don't think it should. Common loot should remain limited to the low tier stuff. Stuff which is supposed to be everywhere in the setting, cheap and plentiful.
For the sake of economy management, flavor and thematic consistency.
Incidentally I still remember when people mocked the hell out of Throne of Bhaal (yes, the BG2 expansion) for treating +3 weapons as disposable vendor trash.
And that was SOMEWHAT justified in lore, given that you were basically jumping between pocket dimensions ruled by demigods and their personal armies.