Tango Lands could have been great(and would have stopped 4 color degeneracy in Standard) if they're ETBt clause was "Unless you control 2 or fewer Land types". Making a cycle that's fetchable but actively discourages 3+ color decks would be an interesting cycle(In standard at least, it would probably need refinement for modern.)
HandLands suck because they're the only cycle in recent years(Besides Fast Lands, but those are so good on the first few turns) that both get worse as the game goes on and require another card to function. Even the Buddies/Tangos, which required other cards, at least got better as the game went on.
