I really do believe xerath needs work
He definetely fulfills the fantasy of long range artillery champ who is scary at range
But his main issues is that he is always inferior and is always a backup pick to 2 other artillery champs ... Lux and ZIggs ... lux has the benefit of also being a burst mage with support capabilities while ziggs is also just an artillery mage but being more reliable and consitent whilst also being safer thanks to W with a bonus reward of turret destroying thanks to passive + W
With xerath ... i picked him up before his rework just because i liked his design and lore ... i felt his kit was unique .. with the rework i feel like i still play him ..., not consistent however i choose him play him spam him take a break and so on But everytime i play him i always ask myself why do i play him ... I play lux whos also artillery with support + burst then i realised oh yes its because shes banned or picked before and i dont play ziggs mainly because i dont really get a thrill out of bomb throwing.. i .e i dont get that feel good factor with him ...
Xerath needs something unique brought to him and i feel like putting the locus of power (prebious W) onto his ult removed that unique ness
Im not here to say hes weak hes boring and to ask for buffs or anything but he barely gets picked and when he meta its always outclassed i dont believe he ever has his moment