Patchset 6 for Siebel IP 2014

Hi,

We are using Siebel IP 2014,Patchset 3 in the project . Few defects were raised and the team was not able to resolve them. So SRs have been raised with from Oracle Support, we have been advised to apply Patchset 6 for IP 2014 in order to fix them. We are having some concerns with it as we are of the opinion that applying Patchset 6 might affect already developed and tested functionalities, which may not be correct entirely. But we do not want to take risk at this point of the project, as this may involve lots of rework