Why exactly is Vlad considered a bad design?
Especially with likes of Lee or Gnar running free. Because it seems to me like he has clearly defined strengths or weaknesses. Lots of survivability, sustained damage and poke, but weak burst unless very fed, no mobility or CC to compensate. Great poke in lane, but weak to early all-ins. Terrible early, sets really good mid-late.
Seriously, give me Vlad in other team over likes of Lee anytime. Because against Lee you always fight on his terms. He has the edge? You're fucked with his 2 gap closers, slow, displacement and absurd bases and scalings. You have the edge. Good luck ever catching him with 350 MS, 2 mobility tools and a huge knockback. Not just hating on Lee - but there are lots of champions far more frustrating to face than Vlad. Gnar, for example. He can kite/chase you for days with mini form slow, insane MS boost and jump, and he can also straight out out duel you in mega form. Thresh has everything a support can wish for with no obvious drawbacks. And more but I'm too lazy to list.
is the low interactivity and decision-making on several of his abilities. Whereas Sanguine Pool and Hemoplague are both pretty awesome, and have high costs (a huge chunk of health and/or a long cooldown) to balance their power, Transfusion and Tides of Blood are just point-and-click abilities (Tides of Blood doesn't even require pointing) that bring combat down to a simple yes/no on whether your opponent is close enough to you. On top of this, Crimson Pact is a lot of power without gameplay, and the health-to-damage/damage-to-health conversion means full-tank and full-damage Vlad builds tend to homogenize instead of differentiating themselves. It also means there tends to only be one "real" stat worth focusing on (AP), when there are seemingly two valid options (so the other's a trap), and it also means Vlad's difficult to stop once he gets ahead, since he gets more tankiness on top of his damage and sustain.