I don't think fixing a mistake that you made in the past should cost so much. For example, on my Corsair I didn't max Cross Cut Blast and I want to max it because I need that extra damage, but if I want to do that since I'm now a level 161 Corsair, I have to pay almost 70 million Mesos to get an SP Reset and fix my noobish mistake I made a year ago. That's a huge amount for people who don't actively farm Mesos and are just playing the game like you're supposed to. Meanwhile main server players can but AP and SP resets for a fraction of the price that the Reboot players pay. SP Resets cost about a 1/10th of what they do on Reboot as well. Sure, you can only buy one a day, but when the hell are you gonna need more than one a day.
TL;DR: Nexon SP and AP resets cost too much for their value.