To me, cost is a BIG factor. Estimate the cost of your idea and multiply it be 100. (That's roughly the number of Fish Extenders we had on PCC 1.0). I would hazard a guess that PCC 2.0 will have more people signed up for the FE than 1.0, simply because more people are signed up to sail.
Transportation of your gift. Getting it to the ship may be an issue for you. Some groups have members that are driving to the port and would take it instead of shipping them. Both a savings in cost and worry about it not making it to the port on time. If it is something you are bringing with you, remember you need to have the space in you luggage for it.
Delivery of gifts. The ship is big. Not overwhelmingly, impossibly huge. But big. One night, I walked every deck, both port and starboard to make myself tired so I could sleep. And to check out the door decorations and fish extenders. To deliver 100 gifts all over the ship would have meant all that walking plus running back and forth to my cabin to reload with more gifts. With a group, you can split up the number of deliveries. One hundred cabins split between ten group members means only having to carry stuff to ten cabins. (You can check out people's doors and fish extenders more leisurely.)
I like the excitement of planning. I am not a super creative person, and am always open to input and other people's ideas. I like being a team player, especially when we have a great goal, like spreading joy to our friends.