[@Goose] Looks good. I agree that Powerload Ogre's gotta go - after that, you can drop them in the character's tab. 

I've never really explained it on the forums before so our main two benchmarks for balance are:

1. Set normal monster > pass on turn 1 (usually) won't [i]immediately[/i] lose you the game (though it's not necessarily a good play) - mainly just something to measure a deck's immediate swarm against. A lot of the decks in the RP rely on slow starts when they can't draw their combo pieces, and while they're expected to draw them quickly/put up some kind of defense or lose, being able to stall a little helps.

2. Nothing is super difficult to remove; if it's unaffected by card effects, for example, then its attack should be moderately low, and the deck shouldn't be capable of buffing it. [url=https://yugipedia.com/wiki/Number_59:_Crooked_Cook]Crooked Cook[/url] and [url=https://yugipedia.com/wiki/Libromancer_Firestarter]Libromancer Firestarter[/url] are about the upper limit for this, and cards like [url=https://yugipedia.com/wiki/Left-Hand_Shark]Left-Hand Shark[/url] or [url=https://yugipedia.com/wiki/I:P_Masquerena]I:P Masquerena[/url] would require you to limit the contents of your extra deck accordingly. Once-per-turn negates aren't as bad, unless they are also omninegates, in which case they may need the same restrictions. Naturally, other aspects of the deck can easily push them off the table entirely. For example, Libromancer Firestarter, [url=https://yugipedia.com/wiki/Libromancer_Bonded]Libromancer Bonded[/url] and [url=https://yugipedia.com/wiki/Libromancer_Fireburst]Libromancer Fireburst[/url] aren't allowed in the same deck, since Fireburst would be able to achieve immunity to destruction by battle or card effect, as well as immunity to banishment. I don't want everyone to be forced to run Lava Golem/Kaijus/Effect Veiler/etc. to deal with particularly ornery monsters.

The rest is mostly balancing guesswork.
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The Libromancer archetype is used in an NPC deck if it wasn't obvious by now. As a modern archetype, it's quite capable of swarming the field. I decided to take out the [url=https://yugipedia.com/wiki/Libromancer_First_Appearance]Libromancer field spell-[/url] (among other support cards - amusingly the [url=https://yugipedia.com/wiki/Libromancer_Origin]really good continuous spell[/url] was taken out simply because it was making Fireburst hit too hard) -to slow down how much the deck can throw out its ritual monsters, since the rest are generally non-threatening. This wasn't strictly necessary, and I might go with other workarounds if I think of them so I can take out bonded and put Firestarter back in, (relying on several different generic ritual spells is awful) but for now it hit the otherwise fairly modern deck pretty hard and brought it down to a decent level.
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Nobody has submitted an anti-fun deck (e.g. burn/mill/exodia) yet but we'd probably be harsher with them, such as Fonda Fontaine's nurse burn deck that doesn't actually have a lot of burn or control cards.

Jon in the NPCs is a [i]temporary[/i] exception to these rules mainly because it ties into his character arc, his deck is a (very inflexible) gimmick I really like, and because I thought it'd be cool if there was an unreasonably strong NPC available to duel against. Nobody has dueled against him yet though, so maybe I thought wrong.