I think NFS requires to have some knowledge for how you want to use it. The defaults seem reasonable, but I also get confused with all the v3/v4 differences etc. I use it at home to connect everything to my NAS and it works very well for me. My export is this:
If you know what each option does, how your network is setup and what your server/clients are capable of, you will eventually find the right settings, but it's not a good OOB experience.