How are you able to follow the discussion when you are rarely on forums? Why did it take so long to respond?
What are you going to evaluate? The poor execution of the event, the bad rates, the bad rewards?
You have said you will keep our feedback in consideration before, did you and your team somehow forget about that when you decided on this event?
Your apologies are empty at this stage, you keep apologizing but nothing is EVER done. Start acting instead of talking, maybe and just maybe we will start to listen.
I doubt that you or your team understand the frustration that has been caused, if you did you would have done something quicker than what you did.
Start reading the forums and give us a list of what you are going to fix. It's called transparency, I know you and your team don't understand the concept, or at least the community feels this way, but it may help.
The poll you created only shows how little you understand about the community and what problems exist. If you had ACTUALLY leveled a toon to 115 you would. If you had actually tried the events, which most people use to upgrade their toons, and seen the dreadful rewards vs the money spent you would. If you looked at the pricing on your events and added up the monetary value you would understand this game is overpriced.
Maybe think about a few things you and your team can do to improve the game and post something, I doubt you will but you know wonders will never cease.