No problem with playing Lead too soft over here! But there's also too loud!
Being that I have always been extremely loud in the upper-register, I actually try to make a very conscious effort to fit the top note in with the chord, instead of drowning it out- which (drowning out the band) most of the time drives band leaders CRAZY!!!!
This even counts when you're way up! I still try to fit Double Bb above High C, up to Double C above High C (which is just about the top of my register), into the chord. I mean, really, they're easier to adjust because the harmonics are so close together up there- if need be.