Plantera has the bulb and the cultist is always at the dungeon. As for "the annoyance of having to kill another boss and completing an entire event to get the summoning item", keep in mind the Moon lord is supposed to be the final boss/the End goal. In my opinion they made it FAR too easy now. They decreased the cost of the sigil (which I felt was balanced at 20) to 12, made it only take 12 seconds instead of 60 AND THE MOON LORD DROPS TWO WEAPONS NOW??? who thought that was a good idea. Its op, unbalanced, unful, and does not feel rewarding... but "yOu CaN gEt zEniTh fAsTeR". Faster/easier is not always better.