Download LR5 Beta and see for yourself if the new tool is adequate.
Sounds like you need a tool that was designed for this task. Thus, CS6 would be my recommendation.
Yes, LR5beta has a new tool which can do this (maybe, in the right situation), but when I have tried, it doesn't come anywhere close to the capability that exists in CS6, or even PSE. I was not satisfied with the quality of removing wires in LR5 Beta.