Is getting annoying to get companions with you if they just destroy any attempt of stealth by their crappy AI just walking all over the place and everyone can hear them, if you tell them to stay in a place and for some reason you start getting attacked they just sit there and do nothing even if the attacked ones are them... like really????
So the only solution i came is to give your companions the same stealth level you have, if you have level 3 stealth let all your companions have that, if you upgrade to 4 then all companions get to 4 and so on, because seriously this is just bad design.