Give us a list of rewards before events start.
Make rewards so that they make sense to players. You recently lowered rewards for lower levels to the point that it doesn't make sense for players to participate in the events unless we are able to get the final unit. Do you know how many people actually able to throw enough money at this game to get the final units? 5-10%? For the rest of us, it doesn't make sense to participate in the events.
Bring the WD back to what they used to be. I think even top 750 factions used to get 3-5% boosts in WD. Now it's 1%. 1% boost is not worth 3 days of fighting. Top 500 get 1%+ 1% and they have to use gold to stay in top 500. Gold and 3 days of fighting for 2% boost? Makes no sense to me.
Bring the gold requirements to what they used to be. We used to be able to complete event using 100-200 gold. Now it's insane amounts of money to complete one of many events each month.
Lower the health on bosses to what they used to be and increase the folder drop rate. If you want to make a special event for top 10 teams, fine, but why increase the health of the other bosses and low folder drop rates?