I'm sure everyone would like having a tournament for less experienced teams, I would too, considering I don't stand a chance competing with the best anymore either.
However, I've been doing this for years, and I can say that people are quick to complain, yet very slow in actually doing something.
Sure, s5 could do something like an "amateur series" but do they get paid for the work they put into the tournaments? No. Do they have a giant staff capable of handling 2-3 tournaments at once? No.
I mean we want sword only, we want amateur series, we want casual tournaments we want competitive tournaments and you all probably have more ideas of things you want,right? sounds like a pretty big load of things to do while having to work a full time job to pay for your own life or studying in university,huh?
Maybe someone else wants to dedicate some time and effort into creating something themselves, or with support from S5 and Aeria.
A 16 team tournament without any stat limits isn't super duper hard to manage, contact a GS to get in touch with Aeria, they would surely support you with a forum post, facebook post, possibly a stream or ingame/launcher images as well. Basically all you need is a mailaccount a bracket generator and google forms + google tables.
Heck even some random guy like me would help you get started, but hey, I've heard people rant for 6 years now but it doesn't seem like anyone actually cares beyond complaining.
Good luck and have fun everyone!