Wiggo is an excellent rider, but IMHO, he does not currently fit on the SKY Team. The 2012 TdF he won was because Froome was held back to tow Wiggo up the mountains. Personally, I think Wiggo should focus on the classics and/or track cycling.
I mean, Froome is presently the best GC rider on SKY, and how does Wiggo help him in any grand tour? And then add the drama between the two, and I can only conclude it's bound to be distracting.