There's too much true damage in this game
In the past games, when facing tanks, an ad bruiser had to choose between Last Wish or other items. Now nobody builds lw, cause Conqueror does the job. Facing less tankier one? Nah, still Conqueror. Needs to kill fragile one? Conqueror. Burst? Conqueror. Now let's see for the adc. Riot made adc do less damage output but compensate them some easy crit and true damage from Infinite Edge. No adc builds lw. Why bother building useless counter item when building just regular build is perfect counter itself?
True damage ignores armor. Some champions had the identity of doing so, but now, it's free for everybody. Tank items are supposed to be countering stacking damage mindlessly. And now you just build enough damage to tear down whatever champion in front of you. True damage must remain as a identity of few specific champions, not any whatever champions.