I doubt you have every worked in an a/c design office, because nobody positions a wing on anything other than 'where it should be' and there's only one place which is 'where it should be'
No, I haven't but the stretch of over 18 feet compared to the DC10-30, almost all ahead of the wing, changed centre of lift and the handling characteristics. Coupled with the smaller tailplane the MD11 is a "handfull" in certain conditions, a reputation the DC10 never had.