After years of contemplating on it, here's my answer:
I'll have to disagree, It's a neat idea, but what if every level group want their own event? The current events are not perfect, but at least they give everyone a chance to participate in it whether there are people participating in it or not. Considering the admins accept it and give 2 events at a time for different level groups, the levels 5-10 for example, will surely come out and say they don't want any chaotics events (since i myself saw that nobody cares about chaotics until level 11, even though there's a non-break & double valor event).
My point is this: You want to have x event for yourself and people of your level range, while there's y event for people of lower level range, then again as soon as this is applied, people of some other level range will surely say they want z event because neither x nor y events suit them. In the end it will be the administration spending effort on giving at least 3 different events every weekend.