Taliyah's not going to be viable unless you change that Q passive.
Just change it entirely don't just 'buff' the gimp.
My idea is instead of limiting 1 shard under her Q passive - remove that entirely and make it so the damage decreases every use under the passive. So the same amount of shards - less amount of damage after every Q under the same spot, that would stack up to x amount of times and do a minimum of x amount of damage.
Because right now she doesn't have enough pressure - not like other champions AT ALL.
Anyone else have other ideas?
Also, I'd be pretty fun if Taliyah could take someone to ride along with her when she ults - enemy or team-mate.