Origins of cannot resolve dependency on WP8?

Hi guys,
I'd like a general explanation of a problem that's been bugging me since I started using XF...
I get that the dreaded error "Cannot resolve dependency to assembly 'Xamarin.Forms.Platform.WP8, Version=1.5.0.0, Culture=neutral, PublicKeyToken=null' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event." happens when using Xamarin.Forms plugins with dependencies to Xamarin.Froms dlls (which is I gather unavoidable in cases when one is making/using controls such as OxyPlot for Xamarin.Froms)...although it happens only to WP8 projects, and not to Xamarin.iOS and Android projects...so my question is that problem caused by Microsoft's VS and apparent inability to use the app.config dependentassembly switching to resolve this issue (and is that then caused by some fact that Xamarin.Form dlls are unsigned and have null PublicKeyTokens or the fact the WP8 (Silverlight) project/dlls are in general unable to be redirected to another/larger major versions)?
Is there any chance this will be fixed in UWP projects, or does anyone know some stardust magic solution for this, and would be willing to share please?
Thanks