How to make LeBlanc viable again
Make her auto attacks proc her Sigil marks
Currently, taking Q at lvl 1 is useless and Q itself is a joke as a harass without blowing ur W or E on it, both having a looong CD early game
Either shift more of Q's damage onto initial hit or make her auto attacks proc the mark
This also makes her better at gapclosing with W and doing a Q R (E) combo, replacing the E with an auto, because realistically, landing your E in that situation is a 50/50 gamble at best (especially without her silence)
And lastly, this can put some variation in her build, such as Lichbane or making it viable to max Q over W