I use Foreflight and do have access to Rocketroute as well and I have autorouter.aero as well. NO software out there can cope with the absolute mess Eurocontrol and the morons in the national ATC units have created. I´d say 70% of the time the sw can create vialable routes in about 10% of the cases they will be suspended because of the activation of an area someplace. Eurocontrol - contrary to years ago - won´t help you at all any more.
The short answer is: give your flight planning to an independant planning service. This might be a few Francs or Euros per flight, but you have the backoffice support that you need these days because ATC don´t do their job (not the ATCOs, planners - RAD !) I´m flight planning since 1990 and I just put in my surrender in form of a contract to a flight planning provider.
I use the combination of Foreflight and LEON to serve my EFB & NCC needs (rwy performance, flight info files, dutytimes, currencies, ETS etcetc)