Here is what I have so far and some of these points might have been raised before on this thread. I might have overlooked them.
#1. For Epic boss, the tiers should be based on the player attacks instead of levels. This is huge disadvantage to the players who level up.
#2. For Epic boss, defeating the level 99 boss should be rewarded with bigger unit instead of valor. Level 99 boss has a health of 85-90% of Level 100 boss.
#3. GLTQ's - Seriously we don't need these. Some of the folks might have a different opinion about this. Last couple of GLTQ's, we have noticed some factions rotated multiple dormant accounts to complete the event. This was metioned on this forum too. Some says its a strategy but I would say it is gaming the system. If GLTQ's are part of the event then the faction should be locked down during the course of the event.
#4. Need better reward units for individual battle wins. It almost requires 4-5 vaults of gold to get those 1500 wins and the current reward units are awefull. I could get much better units by completing the LTQ event with far more less gold.
#5. For the Ground Medals, the medals should be awarded based on the individual's acheivements instead of faction achievements. Personally, I have spent about 30K gold in the Cuba event to get the medals and surprized to see the last 3 medals were given out on streak wins. If this was known to us in before hand, we could have planned appropriately on how we spent the gold on the events. Some factions may not go all out to get those streak wins considering the insane amount of gold required to achieve them.
#6. On iOS devices, we need real-time faction rank during the WD event. Just like the way it is on Android. I do believe the faction rank also plays a role in the match-up algorithm and this would help us to better prepare the faction for the next match-up. Most of our faction members are on iOS devices.
#7. Better drop rates for bricks and intel folders. When the higher level of walls (level 15) have been introduced about 2-2.5 months ago, the drop rate for bricks have gone down from average to worst.