There is a thread in the Non Vision Section of this forum regarding the B&H kits. You basically get DJI AVL58 FPV, JDI IOSD telemetry, monitor, and Gimbal, all theoretically installed by experts. You also get the a full 1km range for RC and FPV, with the installed stock components. Perfect for those who don't want to solder. B&H is also a great retailer.
In theory, you get all the great conveniences of the P2V, and the advantage of, what users claim to be, better video. Finally, you'll be able to use the full proven Ground Station app with an additional hardware upgrade.
You're giving up the compact and refined nature of the P2V and the convenient app feature (you need to use an included dumb monitor). But for those of us who are adding antenna's etc to get additional range, we're losing the compactness benefit.
For me, the biggest disadvantage of the P2 non vision is twofold. In technical terms, more stuff added always means more stuff to go wrong. More importantly, you can't remotely control the gopro in terms of taking photo's on demand, stopping and starting video. This is huge for me. You can preset photo capture at intervals, and record continuously, but I prefer "on demand." Finally, users report that the photo quality of the p2V is better than the gopro.
If any readers think that I am wrong in any of my assessments, I'd be grateful for a correction. I was seriously considering the P2 Non Vision.