Courtesy of Free2Play giving a great suggestion, and @Speed pointing out the root cause of recent event incompletions, I think it would be great if there was a bonus item for items collected from buildings. More and more events are becoming dependent on building drops, and most players would admit that they are the hardest collections to complete. Between thetime restrictions to collect from buildings and the requirements to build those buildings in the first place, a bonus item for building drops would go a long way, and would give players a fighting chance to complete events the first time around. The main issue is that even though everyone has the same odds in an event, some players' RNG is more favorable than others. This item would help those whose RNG isn't providing them with ample drops naturally, and would make the event a bit more equal for all players.