Thank you for making me quit the game. If that was not the designers' intended purpose for this event, then you guys need to rethink some stuff. The tasks are too tedious and some are extremely hard, for example I'm already a high level and raising my hero level even once takes a couple of days. If your first event is already pay-to-play then this game is going nowhere.
This is the first time I've heard of an event designed to be harder for older players. Logically it appears that players are punished for playing the game a lot. Personally, as a completionist, by being blocked from completing this event I no longer find the game worth my time.
Another matter that should be addressed is the ridiculous healing rates of AI, especially in the tower, where 3-5 thousand HP restored in a single move is common while players are healed for much less. There's no challenge in the fights themselves, they just take forever to finish, which for a 'match 3' game isn't really that great.