By all means, quit MODO so I can get cheaper cards for when you inevitably come back. "I'm quitting MODO forever" is the most impotent threat ever, but also fortuitous for those of us who just figured out how to use the beta client.
No seriously, I want you guys to explain what it is you can't figure out on the V4 client.
I run the beta client on my barebones 5 year old work computer with no problems. Its an illusory problem.
All the windows popping up is pretty shitty. Finding a match is a pain compared to how it used to be (looking in the different rooms) since you have no idea how many people are in a room. You sort of have to start your own match and hope someone runs into you.
The preview window is dumb. I think you might be able to integrate it into the main window, so will try that. Otherwise, when you right click it only tells you what the card can currently do. An example is on leveling cards, you can't right click and see what the cards do at different levels.
Too much dead space. Looking at the Trade page, almost a third of the screen is wasted on your post, even if you don't want to post anything. The red section on the battlefield, what is that for if there aren't any global enchantments. Even if there are, why have that, one player will still control the card.
When viewing a hand to discard something, the tile the cards like they are land instead of spreading them out so you can actually see them. Usually you wont have more than 8 cards in hand ever, so why default to the old searching a deck interface?
This is my basic complaints from just one match today after reinstalling it to try it again. Will probably get more if I spend more than one hour with it and playing more than one match. Will also probably start to look past some of these as well.
Also, the shuffler is still broken