My evaluation comes from my own biases, which boil down to: play the sort of cards and decks that lets everyone at the table have a chance to breathe, play Commander, and have at least a decent chance to do the thing that their deck wants to do
1 Borderless common or uncommon 4 Commons 2 Nonlegendary uncommons 1 Legendary uncommon 1 Legendary uncommon (in 50% of boosters) or a nonlegendary rare or mythic rare 2 Wildcards, including rares, mythic rares, borderless rares, and borderless mythic rares 1 Legendary rare or mythic rare 1 Nonlegendary rare or mythic rare 1 Traditional foil card 1 Token/ad card or card from The List 1 Art card, with a gold-stamped artist signature in 10% of boosters
It doesnt copy whether that permanent is tapped or untapped, whether it has any counters on it, whether it has any Auras and/or Equipment attached to it, or any non-copy effects that changed its power, toughness, types, color, and so on
Ravnica Karoo lands are great in control decks that want to ensure they have enough lands to cast their spells