Bring GW2 to cloud gaming; it's here and it's next generation. Cloud gaming gives more options for game play. PC gaming rigs are still viable and it's just another alternative to the experience.
To be able to play GW2 in a mobile screen, with game a controller, would be transformative.
As for the drawbacks, those only apply to cloud gaming. These can be avoided by still running the native version. This is about opening up the game in more places. As cloud gaming advances, these shortcomings will get addressed.