Wonders never cease...
So, I have been tapping away on the mobile and found a few evident faux pas-es that needs some serious consideration when it comes to this new feature:
• There's an issue (depending on how a city is laid out) where it does its "going around" every inactive building thing. It's sometimes easy to forget how many buildings or easy to go "tap happy" so one can close out the window. After the last building, the user clicks on a building where the field for the last building in the production window is at (say, for example, you clicked on the 8 hour production time). This will bring up the window of current production. If a person didn't have in the "confirm diamonds spent" box checked in, they will lose diamonds by inadvertently clicking on said button. I am sure those of us on the PC version would have this problem if we're clicking really fast. When we press the numbers, it would not do such.
• Is it really necessary to move all around as each building is selected for production in the background? I'm pretty sure with that and the response of the user on each building is taxing to the mobile's system resources, sometimes causing the game to crash. I haven't experience that as of yet, but I am sure if I do it enough it will hit that point.
• You already know about the "zoom" thing we all hate to this day on the PC. Why beat around the bush and play the "ignore" game to this? Shouldn't you all be working on a fix by now (I think I had already pointed out where it was linked to since I know there will be some lazy programmers out there that would recycle certain sub routines in order to save time; trust me, I had done such, but I also test to make sure such shortcuts were working correctly before distribution).
Bottom line, no matter how many gimmicks (events, diamond promotions, etc.) you put out, if you do not address and correct the important issues that affect game play and player bases, those gimmicks would mean dick and your efforts will be all for naught.
I would move for removing the feature entirely and returning the production back to single use like it was before.