Well I have decided to keep my Lumia 1520 - and I have been offered a Google Play Edition Galaxy S4 very cheap 220 so will get that to pad out my missing apps (was going to get Moto X but thats 350 and can't justify the extra for a spare handset.)
Question now related to the Lumia 1520 and other Lumia's in general.
Anyone experience weird bugs such as screen going 8bit color style requiring a quick toggle of power button and re-waken to correct, or the odd keyboard glitch where in direct sunlight it looks kind of freaky as if the light sensor is going on a bender ?
The only common bug I know of is related to the odd touch input. i.e. you go to swipe and the phone thinks it is a touch. Have not heard or seen what you are describing.