The thing you meant by “decrese C/I” is not so obvious.It is rather the reverse.
Regarding Co-BSIC BCCH,I never said that it is going to cancel its effect entirely,but it will definitely improve the n/w C/I by planning different TSC’s for the hopping TRX’s.
For networks having tighter BCCH BSIC reuse,it works quite good.
Also how does N/w sync speed up intercell HO??