Apple TV (2) name, AirPlay dropouts and more.

I have 2 Apple TV 3's, each with a unique name. One located in the lounge, the other in a bedroom. Subsequently each named "Lounge" and "Bedroom".

I have run the same network and devices for almost 2 years, except for the addition of the iPad Air 2 and the iPhone 6. Apple TVs were on OS 6.x until the release of OS 7.x. During the period of OS 6.x i never ever had an issue with AirPlay from any Mac or iOS device. Which include MacBooks, Mac Minis, iPods, iPhones, iPads.

One Apple TV is connected via ethernet, the other is via WiFi (1 wall away which shows full signal when checked each time).

So i decided to update to OS 7.x when it came out and then i have been plagued with problems ever since, through each update 7.0, 7.0.1, 7.0.2 and 7.0.3.

There is three main problems with these 2 devices as a result of 7.x.

1 - Each Apple TV changes its name at random in regards to the number, one might be "Lounge" for a moment, the next it will be "Lounge (2)" or "Lounge (3)" and so on, usually reverting to "Lounge (2)", either during use or sleep mode.

2 - 90% of the time they will not wake from sleep for the AirPlay function from iPhone 6 on iOS 8.1.3, iPad Air 2 on iOS 8.1.3 or Mac Mini on Yosemite 10.10.2

3 - When it finally does wake, there are constant AirPlay drop outs, most of the time the AirPlay link will drop and some times disappear off the AirPlay devices list right afterwards.

Both Apple TVs produce the same issues, time and time again, i have restored them completely twice each, i have had one replaced for these issues under warranty, yet these issues still remain.

I have tried them on 4 different networks, i have even replaced my modem/router as part of this problem, and still these issues remain.

I even set up via a test with a personal hotspot from one of my iPads, so all i had was an Apple tv, iPad and iPhone on this wifi hotspot, the same issues were present there also.

During this time i have had iPad, iPhone and Mac complete restores for other issues which rules out issues with them i would like to think.

I have even tried AirPlay stability from my older iPhones, iPads and iPhones on iOS 6 and 7 - the same issues are present there also.

I have had many many cases with Apple Care opened, each case gets me no closer to solving generally because the "Senior Advisor" appointed to the case never responds to me after getting off the phone, despite them emailing me with their contact details to "follow up the case" so i don't feel any more efforts there will get me any closer at this point.

I have exhausted many options with no success.

Does anyone else have these same issues?

Has anyone ever found a fix?

Has anyone got any other methods of diagnosing the root cause of this?

I would love any info on this, I'm at my wits end with AirPlay.