Grats, Rito rework made Xerath worse
Ult has been ultra underwhelming after rework and hard as hell to hit on competent players. Now, you increased the interval between shots of the ult, making it even harder to land. Before I can quickly unload 3 shots of my ult at a CC enemy for quick damage, now I can only land 2 shots before having to aim the third. I rather use all the charges on my ult and get back to using my other skills.
Please give Xerath a new ult. or strengthen his other spells. W and E's cooldown is too long, maybe make E more viable or reduce the cooldown of W. Since you want Xerath to fit your ideal of a long range mage, just revert him back to the old Xerath.