Honestly, I feel the complete opposite is true. If you compare Luden's to Deathcap, their damage breaks even when 30% of your AP fed into your combined ratios is equal to 100+15% of your AP. This makes Luden's a stronger option early and also in situations where your combined AP ratio is low (poking). This is in contrast to how DFG beat Deathcap, which was in burst scenarios (it also had damage amp and %HP damage, both of which scale lategame). Considering how much the game has been all-in focused lately (assassin meta, now a tank meta, the top supports are all-in focused, etc), I think it's perfectly fine to introduce an item that's stronger on poke patterns. Yes, I know some assassins still use it, but I'd prefer them using Luden's to them having DFG again.