The explanation below given when Edgar Markov was banned in dual commander, to a large degree describes what MTGO 1v1 has turned into, with “Edgar VS anti-Edgar” strategies, that is edgar VS control decks filled with red/black sweepers. I think it's pretty obvious that Edgar should be banned in MTGO 1v1 too.
Edgar Markov
Before “Eminence” got released in Commander 2017, two commanders got abilities that somehow worked from the command zone: Oloro, Ageless Ascetic and, to a lesser extend, Derevi, Empyrial Tactician. Both of them are banned in Duel Commander. Having abilities on cards that actually work from the command zone negates the concept of casting commanders, and are very easily overpowered when played in duel.
Edgar Markov clearly offers the ability to build a very solid, overly intense tribal deck revolving around vampires. The flavor is cool, but the taste is not. For 4 weeks already the card dominated most tournaments it got in, polarizing the next ones to “Edgar VS anti-Edgar” strategies only. Which is the very definition of “going against diversity”. Which also demonstrates the expected and found power of the card. Which easily explains why Edgar Markov is now banned as a commander.
UWRUWR Delver/Lynx TempoUWR-------UWRUWR Midrange GeistUWR-------UWRUWR Nahiri ControlUWR-------UWRUWR SaheeliUWR
BGRJund / Jund ShadowBGR-------BGWAbzan / Abzan ShadowBGW
Commander (Leviathan/MTGO): UWGeist of Saint TraftUW
Edgar is banned in dual/french commander (20 life), but not in MTGO 1V1 Commander.
This weeks MTGO 1V1 challenge was won by Edgar again, and there was 12 Edgar lists in top 32: https://magic.wizards.com/en/articles/archive/mtgo-standings/commander-1-v-1-challenge-2018-01-08
A real cheese fest...
UWRUWR Delver/Lynx TempoUWR-------UWRUWR Midrange GeistUWR-------UWRUWR Nahiri ControlUWR-------UWRUWR SaheeliUWR
BGRJund / Jund ShadowBGR-------BGWAbzan / Abzan ShadowBGW
Commander (Leviathan/MTGO): UWGeist of Saint TraftUW
https://magic.wizards.com/en/articles/archive/mtgo-standings/commander-1-v-1-challenge-2017-12-31
UWRUWR Delver/Lynx TempoUWR-------UWRUWR Midrange GeistUWR-------UWRUWR Nahiri ControlUWR-------UWRUWR SaheeliUWR
BGRJund / Jund ShadowBGR-------BGWAbzan / Abzan ShadowBGW
Commander (Leviathan/MTGO): UWGeist of Saint TraftUW
http://www.duelcommander.com/2017/10/classic-sept-2017-rules-banlist-update/#comments
UWRUWR Delver/Lynx TempoUWR-------UWRUWR Midrange GeistUWR-------UWRUWR Nahiri ControlUWR-------UWRUWR SaheeliUWR
BGRJund / Jund ShadowBGR-------BGWAbzan / Abzan ShadowBGW
Commander (Leviathan/MTGO): UWGeist of Saint TraftUW