Hello friend, if you are applying for 2nd round of ACPC you only have 1 disadvantage ie if you fill your choices in a bad order their are chances that your colleges/branch might degrade ( ie you go down from your old college). While advantages are quite high as you can get a good branch or college and also might get upgraded in your college.

So while filling choices you need to keep 1 thing in mind ie fill all branches/colleges whose cutoff are higher than your own current college/branch and keep your current college at last place ( even if you dont get allotment in second rank your college allotment will stay). So what I suggest is go for 2nd round just do choice filling carefully.