Well I guess to put it short, as mentioned above, the prototype does allow a conclusion on that? How else did they build that and get us all engaged in the project?
So to make a short answer long, I do an educated guess :
1) Who does have the best of all? No one I guess, but I think that the pimax team has people that are good enough and had time to gain experience with the PiMax 4k
2) They seem to have contacts with good resources, maybe not the best of the best, but good for what they are doing. Sure it bee awsome if they could develop all the parts as they dreamed it - but that is not how it works in most cases today
3) PiMax is small enough to have the need to supersed the standard out there today. As mentioned often, Money plays a major roll - pimax would not be able to get there share with a 1 to 1 clone of a vive - and HTC vive does not seem to care at the moment for "high end" HMD's. The only way for either to make good money is what you are seeing right now. I am sure, the moment PIMax would gain large market shares the other will react - and yes maybe with better products.
4) Yes and no - they dont have the resources to develop the unexpected, but enough to get "cutting" edge stuff together so it will work, hopefully as close as possible to the aimed goals.
Sure I would love to see them outreach the competitors in every aspect for the money I gave them, that would be awesome - but I see it realistic, its a process and the first step is a functional HMD, the rest might also develop but only time will tell. And yes I also would wish they would act a bit more professional on many aspects (4k 60FPS fixed in lens shots, periodic updates with true content, and so on...) As a Baker of Star Citizen I know that all can be done a lot better - on the other hand I rather have them focus on the HMD, if they don't have the "resources" to do the other stuff.