As long as they stick to the pve builds they should be fine, the pvp builds these people give out are rarely good, but decent. The problem with taking a pvp build from a website is the fact that while you have thier build, you wont have their playstyle.

I reccomend if you are playing pvp to theorycraft your own build. Know your weaknesses and what sets are best to use in different situations, how much regen you need and healing and try to maximise the damage you can deal.
https://en.uesp.net/wiki/Special:EsoBuildEditor
Heres the website you can test out what stats your character can get.

There are always things you need when making a build: 1 or 2 sources of healing abilities, snare/root immunity, major expedition, major resolve and also damage skills and debuffs.