I like the new MTG Mulligan variant that is to be tested in London. Definitely, it must be seen whether this does not favor combos too much, but the current mana system and the structure of the current Mulligan simply lead to non-games too often, especially in my favorite format EDH. And it just feels stupid when you have to go down to 4 and still have a crappy hand, or then just scoop - and the others can discard their good starting hands because they would otherwise have a game with N-1 players, where one watches. Of course, in multiplayer, you can directly offer the other a further 7-card Mulligan, but the new variant would not make this necessary - I can always choose the best N cards from 7, so a 4-card Mulligan is bearable.