Question is, did they mess up something with Arctic Islands for VR, so they now have to launch some old crap in the same time "for VR"?
I don't believe you are asking the right question. Please, indulge me for a moment.
Let's say that AMD does release Arctic Islands at the same time as Fiji x2. Arctic Islands based GPUs are currently all slated to be middle to high end consumer cards, designed to pump out either 1080p or at best 4k resolution pictures. These cards do well in that arena, but the software and hardware for VR is more demanding. The calculations for spatial relations have to be done, and there are a ton of them. Thus, you've got GPU based calculations. GPU calculations which favor massive stream processor counts.
Now, let's assume that Arctic Islands is built off of a 16nm process. Fiji is built off of a 28nm process. Fiji x2 will therefore support more processors, despite the much better processors per area of Arctic Islands.
The reasonable person asks why not just strap two Arctic Islands GPUs together and get better processor count and less power draw. To that, I ask what platform would allow this. The mainstream offering from Intel doesn't offer enough PCI-e lanes. The enthusiast offering makes the already expensive VR hardware all the more so. To answer this, AMD offers the Crossfire on a stick, so that VR is more affordable.
So, here's the best case. AMD is theoretically waiting on VR. They release Fiji x2 as a one card VR machine. Fiji sells because it's the best option for a budget minded VR experiment. Worst case AMD is lying and Fiji x2 competes directly with Pascal and Arctic Islands due to the delay. I choose positivity here, because AMD really needs wins here. Whether that's stupidity or realistic is up to you to decide.
Edit:
Let me make this clear, I understand Arctic Islands is much later in the year. The reason I've indulged in all three releasing at once is absolute worst case scenario (for AMD/Nvidia). It won't happen as such, but helps to illustrate why the situation isn't particularly apocalyptic.