Can we please have 'general' MTX slots for all the cool new stuff?

I really like all the new MTX we are getting, but why is it always tied to a piece of equipment?

For example, why do I have to use a specific back attackment to get the on death explosion? The explosion is really sick, but I really don't want lose my back attachment for it. Same for all the new stuff thats attached to helmets or cloaks and even the new slots like rings. Soon we will have dozens of ring effects but can only have two even though these effects technically don't exclude each other (why can I not have the podium, level up animation and exorcist effect all at once?).

It makes sense to only be able to equip one armor or weapon effect but why do I have to choose between ring effects that seemingly have nothing in common?

It would be nice if we had some "general" MTX slots (like in the currency tab) where we can equip things like level up animation, death explosions, corpse to gravestone conversion, effect on identifying items, etc.