Recently I started a character in S2, cause this is the season I didn't have enough time to experience.

When a season 2 weapon drops, I found its skills seem never roll the enhanced version (at least for me)

This is different from season 5 and 6 weapons, which seems always roll the enhanced version

I suspect similar issues would also happen for season 1. (Non-season weapons roll enchanced version normally)

Though this is not a big issue (for not many people would play S1 and S2),  and not the most urgent issue, it may be fair to fix this in future and make them drop the enhanced archaeotech weapons as well :)