However, after checking the manga once again, I figured out that this is just not true. 73 wasn't really as strong as Young Moro on Namek, and this is based on this bit:

Clearly there's a difference between 73 copying everyone's abilities, with him copying Moro's abilities. Moro said: "It wasn't only my magic that I had 73 copy." Then proceeds to say he copied his combat abilities. That means 73 didn't use Moro's actual raw power before. He was just base 73 with Moro's magic. The fact that Moro had to explain that it wasn't just his magic that he let 73 copy shows that 73 did not use Moro's raw power. When it comes to Moro's raw power, 73 actually had a copy of Moro AFTER the two months time skip, which was saved for emergencies and fuse to become Moro 73.
This means the 73 that drained Gohan, Piccolo and Krillin's energy, and the one that Android 17 fought with, was actually Base 73 with ONLY Moro's draining abilities, not a full copy of Moro's raw power from 2 months ago.
What are your thoughts? I made this topic because there are people that believe 73 was Blue tier with Moro's powers, even though it's clear that the only thing everyone focused on when 73 used Moro's abilities was his magic and that was it.