Retake ACT & chances for Ivy League/top schools transfer?

In high school I got a 33/34 superscore on my ACT. Is it worth it to retake? I personally don’t think so. Applying to schools like Brown, UPenn, Tufts for sophomore transfer (currently attend top 20/30 school). Also, should my essays be much more straight-forward and less creative than when I applied as a freshman? And do I really have any chance of getting into Brown, Tufts or UPenn (HS GPA 4.0, college GPA 3.9+)? Would the fact that I’m already at a top 20/30 help?

@potentialtransfer2018
No, that should be fine. You GPA is more important now. Where are you transferring from, and why?