User blog comment:Emptylord/2017 Patch Notes (Unofficial)/@comment-11520377-20170717173639/@comment-3974211-20170717184249

You make the assumption there's no reason to increase scalings. That said, I do not think I actually went around and just buffing champions. If there is a reworked ability than it shouldn't just use the existing numbers - that would be stupid. The way I generally do custom champions and champion reworks is to base their scalings on existing champions abilities.

Zul'Jin was the inspiration for Olaf, yes, although it wasn't quite that straight forward. I began by throwing Dr. Mundo, Tryndamere and Olaf into the blender, and it just so happened that a lot of the abilities I had left coincided with Zul'Jin - and so I rolled with it. It's not quite an exact copy, though - Olaf cannot meditate.

You also make the assumption I'm not aware the games have different balance thresholds, and that I did not attempt to take this into account where I was inspired by other games. All instances where another game's mechanic inspired a rework in this thread was balanced around League's power budget. For example, I do not think that Leoric's March ultimate would be an ultimate within League (in fact, I do not think it qualifies as an ultimate even within HOTS) - it, in my opinion, fits perfectly as a basic ability on Mordekaiser. He's iconic for his lack of mobility and I felt giving him an "unstoppable walk" allowed him an interactive strength that didn't detract from his identity. I did not just stick it in League's context for no reason and wipe my hands.

There's also the fact balance is completely arbitrary and varies wildly from patch to patch.