While it feels like going wide was the hotness at MC London, this could change as soon as the next SCG Modern Open
When challenging other players the game actually uses a variety of factors to match you up with someone of a similar experience level -- so newcomers don't have to worry about getting humiliated by a TCG expert when they're just learning the ropes
The sixty cards each player has drafted form their "card pool." Using those cards (and as many basic lands as desired), each player builds a deck of at least 60 cards, including their commander
This allows for some interesting additions
Despite any combination of Pokmon you may bring (barring most legendaries), the game's AI will always match you up against opponents with Pokmon who have almost perfect type coverage and will absolutely stomp you if you are not prepared
Not only that, but it can turn into a beater itself, so you can continue getting value from it