Noise:Always have it in mind that the moment you start with the policy that you must hear yourself during a ministration/performance/presentation with your group or band,
noise starts from there. I'm not saying you shouldn't be audible with your instrument, its not in all cases that the musical gadgets will produce what you want, moreover they have their limits and get spoilt even at work.
Submission:No matter what the case may be, even if the lead vocalist isn't as bold or good as expected, submit to him/her, respect the little talent, encourage that person, and never say you are too good to play for an artist.
To everybody you come across in life, they have their different ways of perfectly displaying their musical talents, that they are not good on a particular pattern/style doesn't mean they are worst in other aspects, and if it's about just learning, life is a university of learning where even the bosses learn from the upcoming ones, and where the learners overtake the bosses, I've overtaken my bosses and my students are overtaking me, that is life for you.