sending midyear reports w/common app.. do i have to?

do you have to send midyear reports that are included in the common app?

b/c for example, if you look at nyu’s application…
for the application for their school, they don’t have a midyear report

but the common app does…

do i have to send the midyear report along w/the commonapp, if i use the commonapp’?

or should i just send nyu’s app if i don’t want midyear report to go in w/my application? b/c i’m not doing so well in my classes.

also, if i leave AP scores blank but i took ap classes, would this be looked down upon? what’s better, blank AP scores or a midyear report w/mediocre grades? (b’s, c’s, a’s)