Those are not issues concerned with salvation.
Legalism is having to keep a law, perform a work or sacrament to earn your salvation.
Discussing holy and Christian lifestyles as opposed to worldly lifestyles has noting to do with salvation.
Dress (as long as modest), worship music, rock music, and alcohol (as long as not to the point of drunkenness) are not moral issues.
Heck, we have a hard enough time living up to God's rules (even looking at another woman lustfully is adultery? Every man on earth is convicted!) without making up a few of our own. It's very easy to put up an exterior that looks good. It's a whole lot harder to actually be holy. Rules like "do not touch, do not taste, do not handle" may look like they help, but they are actually of no value against fleshly indulgence. So what's the point of trading a Law we can't keep for one we can that won't get us anything anyway?
le·gal·ism ( P ) Pronunciation Key (lg-lzm) n.Strict, literal adherence to the law or to a particular code, as of religion or morality.
A legal word, expression, or rule.