I don't really believe there's anything wrong with shuffler, just having a rage moment due to losing first round of an 8-4 with an amazing deck that I barely played.
As bad as the EV on drafting sucks and leads to occasional rage moments, one thing I've been liking more and more about mtgo is the triggers happening automatically. That minigame in paper where everybody can't wait to point out your missed triggers is what puts me off the most. It's not a revelation by any means but it just makes the online community seem a lot less hostile due to this one feature.
I can see how you might take a missed trigger as your opponent points it out as an act of hostility, but you have to imagine it from his perspective. He is mentally prepared for the game to stop for you to point out your own trigger. When you don't and continue pass that point, it's like a small victory for them. In close matches, these types of small "mistakes" can really decide a game.
He's not being like Nelson saying "ha ha, you missed your trigger" but it's really like "awesome, that's not going to happen THIS turn".
Playing RUG for so long, I wanted to remove the red for white. Once the UWR delver came out, i liked the inclusion of white for swords specifically. It's absolutely the WORST to lose to a resolved Knight of the Reliquary with zero outs in your deck. At least with white, you won't have that problem
Of course in a tournament atmosphere this isn't the best place to have things pointed out to you. I will say paper forces you to be aware of everything that is happening at all times.
In LGS matches, I'll remind opponents. In real tournaments with money on the line, I won't. Some people will call you a jerk for not letting them take moves back to allow certain triggers/events to happen but placing your blame/anger on your opponent won't allow you to learn from your mistakes and progress as a player.