Plarium is not responsive to any recent problem reports. The bug with the incorrect display of upgraded buildings on the city graphics was reported over 4 months ago. It is still not fixed. This should be simple since it worked at one time.Letting something like that fester for months is incomprehensible.
The game app has been getting really really bad. There is a serious lag issue on many screen updates. It is not as bad when few players are online so it appears to be slow/overloaded servers but not sure.
Sending raids on cities or PPs is a nightmare. Sometimes it takes 2 minutes for the troops you have selected and sent to actually leave the city. Long enough that you think you made a selection error so you try again and again... Finally the troops leave and you get a bunch of error messages.
General equipment screen locks up regularly. Often multiple items occupy the same slot and "invisible" items occupy apparently empty slots.
Switching from city view to map view is very painful. The map comes up blank and it takes 30, 45 or 60 seconds for the cities and other features to appear. When you time raids carefully this totally disrupts any opportunity to send resources ahead of the raid, to coordinate raids, spying missions and PA attacks. This lag issue is making the game unplayable.
Most of my coalition team mates have the same problem so it's not about my computer or internet connection.