All the time that using the show hall is a matter of individual choice, I have no problem. The very first time that it becomes a quest or daily challenge task, etc. I am gone. It is easy enough to ignore features that you don't like when they are optional but I will be seriously offended if it ever follows the current You Tube trend of forcing an advert on users.
I fully understand the needs of any commercial enterprise to maximize revenue and profit, however if Diamond revenue is failing to maintain Inno Games in the manner to which they have become accustomed they would be better advised to examine the root cause of that issue. I suspect they will find that it is related to the high cost of diamonds when compared with the rewards that they deliver. It would probably also be beneficial to examine the revenue around the main events. Once upon a time I was happy to buy diamonds to secure what are "effectively game changing prize buildings" from events. Since the increasing trend of "lucky dip" scenarios have been introduced, I have stopped spending real money. Along with the vast majority of sane people, I want to know what I will get for my money, not buy the chance to possibly, maybe get something I want but more likely get a load of rubbish that I don't. If I wanted to gamble, I would go to a casino, at least there is the possibility of a cash reward. I fear that I am ever more inclined towards console type games where I make one payment, play for as long as I want to and am not put under constant time pressure to complete something; especially when they deliver significantly better graphics for substantially less cost than a decent sized diamond pack.