Strong deck but weak backrow (not gonna work). Weak deck with strong backrow (sometimes work). Strong deck with strong backrow (unbeatavle deck).
So any deck you build its too much relying on backrow (drowning, wall of dis...., mirror wall, treacheous, floodgate, canadia,) which in case non of cards above ever show up in the anime, except drowning (used by queen in yugioh vrains series)
Business wise it is not smart to ban yet.
Until every or most players have bought the boxes for Dark Magician and Invoker. If you ban them now no one will want to buy those boxes, resulting in a huge loss for the company.
If you want Konami to release the ban list right now then try to convince everyone to purchase 3 copies of dark magician/invoker cards. Konami won't have a reason to wait then
Gigaplant or any plant based deck should return as meta.