I suggested this to GM 3K long time ago, that adjust the item stats according or base to the original stats.
But he said he need to study, I think no need for that. Its just simple.
For example, 98 sets and weaps are the most balance, then increase the higher level items base on the 98 sets and weaps not base on the developers judgment, player's request, etc.
The creator of this game made everything balance, editing to much will make it imbalance.