The player-level upgrades are considered the easiest way to increase the performance coefficient limits.
At least for Zheng Yichen, it's this way. For ordinary players, even if their level is improved, and their attribute performance coefficient limits are raised, it doesn't necessarily mean they can reach those limits.
Unless their initial attribute performance coefficient was already at max value, only then would the limit-increasing effect of the upgrades truly show its significance.
After reaching max level, Zheng Yichen had to find various ways to obtain additional limits. Now, after killing a God Subordinate, his limit was directly increased by 50%, marking his biggest gain yet.
