That is so ass backwards it's making me go blind. If you're gonna put that much effort into it, why not just systematically ban all Walkers and good 6CMC Lotus targets.
Lotus, Frog, Will is a fun fair deck
Hello World's deck this round was clever and decent.
Lotus, Lotus,
Grid Monitor is the exact same power level as Monitor was this round
Lotus, Lotus,
Flameborn Viron is useless.
Lotus Bloom,
Lotus Bloom,
Barren Glory is still a turn 5 win and a "one-card deck"
City of Traitors,
Island,
Laboratory Maniac is still a turn 3 win and only slightly more vulnerable.
It's much harder for Lotus to become a dominate strategy when only a handful of Titan level targets are available each round, rather than have every other round be "Barren Glory wins" because someone wants to unban the ONE card you want to keep down.
I'm gonna do an experiment when I go home and replace all instances of Lotus in the last round with the appropriate storage land and see how it turns out. My assumption is "not much different" except Ajani beats the 5 CMC walkers and maybe Aaarrrgh's deck ticks up a bit.
Edit: To go into the first point in a bit more detail. People like Lotus, they will repeatedly try to unban it as long as good lotus targets exist. Ask yourself why Frost and Grave Titan are still on the ban list...no body cares about them, they care about speed. Lotus give you the speed and still has powerful targets. It will be a while before someone says "I really like Frost Titan, you know, as a person. I specifically want to win with a Frost Titan deck!"
You'll have less of an uphill battle banning a bunch of cards no one really cares specifically about than unbanning potentially format destroying cards which will become a back and forth of bans and unbans.