I agree, but as the game grows new design space should be explored. True damage was a design space old devs essentially made taboo, only allowing a few champions access to it. I'm guessing the new devs are using that unexplored design space to find a healthy iteration of true damage on more champions. Perhaps the first few attempts may not be perfect, or even good, but hopefully as they continue to explore they'll figure out a healthy niche(s) for true damage.
So I think it's still too soon to say there's too much true damage in the game. Personally I didn't like where they took cdr in the later seasons; I thought it was too widespread. Now that they've made it slightly harder for mages to max cdr, I feel like cdr is in a better place than ever before.