Well, the Legacy version was also problematic a long time ago and it got fixed I guess.
It wasn't as bad on the key input in their Legacy version, but it is over with, now.
Video paused and chat disabled is lowest 5% and can climb to higher 10s at random times. Spamming keys and holding delete can raise it to 40, and upper 10s as long as I hold Backspace. Video paused 7 - 20, random flunctuations. Man, just holding the 'Backspace' key and the CPU was constantly in the upper 40s. The climb in % I replicate by spamming keys, or even holding Backspace.
If I type(Spaming keys), it can climb up to upper 40% it even hit 60%s(rare and wasn't reproduceable, it was able to replicate to the 50s). As high as 65% while loading, but then it sits in the 30s to Low 40s.
