Senator Marco Rubio (R-Not Really) has very rashly enabled comments on his Senate Web page asking the general public (which includes you) to comment on ways of improving the bill. I count 147 so far.
Hat tip, Byron York who points out
...the suggestions Rubio has so far received are remarkably negative. Actually, they are overwhelmingly, crushingly negative, criticizing a wide spectrum of issues included in the Gang of Eight bill. The commenters Rubio has invited to speak really, really, really don’t like what he has done.