You know what would be a really cool Vladimir rework?
Vladimir's Sanguine Pool to be a short cooldown toggle ability. Instead of losing 20% of your health per cast with high cooldowns in between Vladimir would be better off (with his other abilities being reworked to compensate) with a toggle pool, "invulnerability" which drains 12% of his maximum health every 1 second but has an inbuilt spellvamp effect on this one ability only which heals you for 50% of the damage you're dealing with it.
I might make another post about by ideas about all his abilities and how he they could be reworked later.