Vladimir and how I feel he could be improved

I played a lot of Vladimir pre-rework, ensuring I had 4 stacks on E and slamming Q for devastating dmg/spell vamp, he was in this state for 5 seasons without too many problems. When playing him, I always thought it wasn't his absurd healing that was op, rather that he became too tanky to burst, therefore he could always heal despite getting combo'd. Now with the new Vladimir, instead of toning down the fact he becomes a mage tank, they decided to keep him tanky but reduce healing frequency and power? Yet still try to identify him as a healer??? Why not change his passive so he doesn't become naturally tanky and return his healing abilities?

Just some food for thought