My biggest complaints is that this doesn't improve much of anything. It just seems like posturing.
Linking to source for leaks doesn't really matter. It'll be on YGOrg or on Maxut's blog 9/10, and any remous are generally text-only that are stated as such by the poster, such as the list of LVP1 archetypes.
The Advanced Clause forcing 2 lines of thought from OP doesn't do much of anything. It's easy to BS 2 lines, so it's mostly just a timesink for the OP, and it's a terrible addition during leak season. Again, not even a thing that is disagreeable aside from leak posting, which is more a problem with a certain someone posting them in mismatched batches and with poorly named topics.
There's also topics where you don't even need to post 2 lines of text. This isn't a creative section where feedback is needed, and you can't force people to be good or helpful at YGO, so live and let live here.
While I don't disagree with having people type up decklists, this is yet another mostly cosmetic rule. No one has a problem with asking or answering "What's X card to the right of Y?"
Same deal with the tags. They're not impractical, but it's devoid of any actual change, just making the section slightly more organized. Makes more sense to have seperate sections for them at that point, despite the low amount of traffic a certain one will generate.
Generally just boils down to:
Okay, not objectionable.
But what does it actually do?
There's not much to object to, AC aside, but there's also no real point to implementing this stuff, outside of the changes to actual sections with Discussion and News, which are good changes.
I think a rule of having to include some sort of identifying factor in the name of a topic, without personal spin, should be a thing. Like you could post "Dragonite [Poki Draco]", but just "Dragonite holding an Aspear Berry" would be wrong.