I have to admit, I have been spamming lucian mid on my other account.
The only reason Lucian started getting picked again is because he shines the most with BOTRK. I don't see Lucian as a problem going top or mid. He's used to lane bully specific match ups.
I honestly do not think he's out of control or even close to it. Once Riot figures out how to balance BOTRK without gutting it, Lucian will probably start getting picked less.
I have tried the old Lucian build with Ghostblade into cleaver, it just isn't as strong as the BOTRK build. That sustain and active that BOTRK gives Lucian is what makes him seem really strong.
Lucian was terrible to even consider playing for a long time.
And Lucian mid or top isn't anything new. Sure, MSI made Lucian popular, but Lucian mid has been a thing for some players for a long time.
Anyway, Lucian is finally able to be played again. He was 6 feet under the ground for a long time. I don't think Lucian needs nerfs. Maybe BOTRK needs to get looked at again because ADCs still use it.