My opinions on this:
In theory this sounds like a decent idea. In game team threads for competitive.
However, I really don’t like the combination of full-on team threads for competitive and people who are not familiar with competitive play. This is already a problem that moveset questions have, but if these are going to be full teams, it’s multiplied by 6. Per answer.
These would also be so cluttered, I can already imagine it.
Like sumwun stated, people already post teams on RMT. If you want to find a viable competitive team, we have a section full of them. There are very good ones there as well.
There are a lot of formats.
Last but not least, as people have already pointed out (and that you’ve acknowledged), there are Smogon samples. And like SSuperiority stated, users on Smogon are usually going to know the meta game better.
That’s it. And again, these are just my opinions.