I know it's not an MMO but the game and it's sequals need to rapidly change and improve if the series is to succeed. To me making people use new gear from year to year is the best way to do it. Also you are right, mostly. I did find myself using new gear but that's because the effort of obtaining Etheric Light was rather time consuming to me. Infusing is much easier and simpler. Sacrifice something stronger along with easily obtained materials.