Discussion: Does anyone else feel like building full AP on Veigar is redundant?

Honestly, ever since his passive rework, honestly it just feels like building more than a RoA (Rod of Ages) on him is just overkill. You're constantly building up tons and tons of AP. From landing skills on champions and farming with your Q, getting assists and kills, you gain AP at a ridiculous rate.

I have had a game where the only AP item I had was a Rod of Ages, whilst the others were, Randuin's Omen, Spirit Visage, Warmogs, Locket, and Merc Boots and still had about the same AP as our Brand who had full build. So about 300-400AP instead of 900 - 1200AP. And yet, I still was doing tons of crazy damage. And still provided wave clear. Only now, the ADC simply couldn't fight me, because I could still just delete them, assassin's couldn't burst me down and overall I possessed massive wall of both damage and tankiness that forced them to ether pile over me, or... just not fight altogether.

Everytime I play Veigar in any role, I build him tanky, grabbing one AP item and then stacking on Health/MR/Armor. And each time I did it, the enemy team was always so confused.

So my question to you guys who play Veigar. Do you guys think that stacking tons of AP on him is just overkill? Or still vital to his kit? :o