i've really enjoyed the 10 team world cup and think a 12 team round robin would be overkill but i also miss england losing to ireland and other shenanigans. my solution is:
-12 teams, 2 seeded pools of 6. have 1, 3, 5 etc in one group and 2, 4, 6 etc in the other.
-top team in each pool gets a game off, 2 and 3 play knockouts. team 2 from one pool will play team 3 from the other pool.
-winners of those play either the team 1 they have not already played or, if say both pool A sides win their knockout, semis are decided through random draw.
-final
the pools based on the rankings right now would be
england, aus, sa, bangers, windies, ireland
india, nz, pak, sri lanka, afghanistan, zim