the funny thing is there were plenty of posts about making it vector like victor's E and rumble's ult.
now people want it changed back? kek.
Taliyah is plenty strong as it is.
Her Q on worked ground only costs 25 mana and deals 140 + 40% ap. 25 mana is damn cheap on a 4 second cooldown
getting all stones to launch and hit deals 420 + 120% AP... ONE HUNDRED AND TWENTY PERCENT for 50 mana on a 5 second cooldown
not only that but she remains mobile throughout the entire animation, not having to stop like most mages to do cast, giving her the ability to keep casting while chasing or even kiting away which has amazing synergy with 
since it slows, making landing all shots much easier. Not to mention the skillshot range is actually pretty long.
her E is at its widest point pretty much the width of an entire lane, and on an 8 second base cooldown at lvl 5 that's pretty strong. and can deal 360 + 80% ap in magic damage if they're hit by the initial cast AND the anti-dash damage if they dash or are knocked into it again with her W.
so including her W which does 140 + 40% ap, one skill rotation from her can do:
420 + 360 + 140 = 920 base damage
120 + 80 + 40= 240% ap damage
lets say you're somewhere into the mid-late game and have around 4 finished items
just from what sounds good, lets go with rylais, ludens that i've seen several people build early on her, a zhonyas, and sorc boots.
thats 270 x 240% = 648
648 + 920 = 1568 damage not including defenses. that's a lot, and for that i'm damn glad she doesn't have an ult that does damage. and that's just with 270 ap, which is not that much.
lets say she has around 500 ap now
500 x 240% = 1200
1200 + 920 = 2120 for a full combo.
and if they're good enough they can get another Q rotation in there for another 420 + 120% ap damage in there if they're in an area that hasn't been worked from Q yet.
she has mobility, zoning, damage, and roaming.
her kit is really packed with a LOT of tools.
CTRL+6 )