They could have put the idea into the current tier system, like for example aditional tier slots depending on the rarity of a item 0 for garbage 1 for normal 2 for rare, those aditional slots you have to unlock just like the current tiering system but with diferent materials, after tier 5 you can ublock the first aditional tier slot and after tier 10 you can ublock the second. Then make new blueprints for new enhancers
And sell the whole thing as part of the upcomming modular weapon system
Like
Slows target for 2 seconds when hit on enemy
Applys dot on enemy
Increase weapons base attack speed
Decrease attack speed on enemy
And so on and so on ... you get the idea
But no we get this limited mindforce garbage noone needs and a glass cannon that eats 30% of your hp, that shit tps you from mid lvl straight to icarus puny grind