I know a lot of people over the last few months have been dissatisfied with the emphasis on conventions in collection events. Personally I find conventions one of the least interesting areas of the game. I effectively switch off for an hour or two, and just click a button every few minutes for the next show. There's no challenge, apart from possibly a few seconds of trying to time it right for a winning show, and although there are stories written for each one, in my rush to start the next show I rarely get a chance to take them in.
I've got an alternative suggestion for future collection events - a temporary party.
Parties are one of the most challenging, interesting and exciting parts of the game, and the way they are set up would be perfect for a short term event like Christmas or Easter.
You could add a temporary party area to the map, that is accessed with a party ticket like normal parties. You could have three themed areas, 15 themed challenges and a range of bosses that relate to whatever is being celebrated. Unlike with conventions, there'd be more of a visual element, as we could see the bosses and the areas on our screens. Event exclusive clothing and gadgets could be won as prizes, hopefully with some mechanism to ensure we don't just get duplicate clothing wins. It would be a lot more engaging and a lot more rewarding than the conventions are.
I think this would be a really cool addition to the game, and I hope it gets considered.