Low CDs are fun, but are they balanced?

Unless I'm mistaken, I remember back in Season 4/5 that CDs, at least in the laning phase if not in general, were much higher and you had that window to punish your opponent. I even feel like late-game CDs are pretty short nowadays, with or without Ultimate Hat/Presence of Mind. I kinda feel like Riot thinks moderate-long CDs are becoming anti-fun. Thoughts?