These groups allow you to talk directly with fellow collectors and cater to various interests, such as specific regions, sets, or rarity levels
Gix has also received some face time, with Sheoldred offsetting any potential life loss
Of course, I would never advise cutting Sol Ring / Mana Crypt if you have them since they're just too good even when not used optimally, but other choices that I normally would auto-include in my Izzet decks, like Worn Powerstone and Thran Dynamo, should probably be replaced by stuff that taps for colored mana
Rather, Kona prefers to split her time between as many survivor groups as possible
Whoever designed this thing really pulled out all the stops, just like Empty the Laboratory pulls all the overpowered Zombie cards out of your library
In an recent interview with Kotaku, Rosewater discussed a big change they were making