Honestly, I do have a problem with their shuffler. Not that it isn't random, it is, but that's exactly the problem. It's TOO random. When we shuffle cards physically, everyone subconsciously mana weaves a bit. You do it a little before you shuffle, and then you only shuffle like 4-5 times, so it reduces large clumps a bit. It's not a big deal, the deck is still randomized (you don't know what cards are coming) and everyone does basically the same thing, so there isn't a large edge.
However, when you go into digital, truly random means you will get 7+ lands in a row sometimes or vice versa. They already tried to mitigate this slightly with opening hands. The computer draws two hands and discards the worst one in terms of mana/spells. i.e. if you get a 1 land and a 3 land hand, it discards the 1 land hand. 2, 3, 4 and 5 lands overrides 0, 1, 6, and 7 land hands.
But, I've noticed I get 2 land hands quite often in limited and subsequently don't draw a 3rd one in a lot of them. I think they are prioritizing 2 lands over 5 lands, too much. The average should be somewhere around 3 to 3.5 lands, but over a few dozen games I was getting an average under 3. Too small of a sample size to prove anything, but it's showing a trend that I don't like.
I would much rather they added some stop gaps to the randomizer for the super extreme scenarios. Such as, you can't have more then 6/7 lands in a row in the starting deck order. If you shuffle, it could still happen that you draw that many in a row, but it's just to cut down on some of the most extreme examples. Mana screw/flood would still happen, but you'd have a fighting chance a little more often.
