HR Renewal in EHP 7

Hi,

I have a doubt about HR Renewal. We are on EHP 7.

We have done some personalizations in ess mss roles in portal and BADI enhancements in r/3.

In portal we have copied the standard ESS MSS role and personalized them.

Now if we apply HR Renewal, what will be the impacts?

Will it overwrite the standard ESS MSS portal role? (in my case it is not a problem as I have copied)

Will it have any impacts on r/3 side on the BADI enhancements?

Also can we directly go for HR Renewal 2.0 in EhP 7?

Thanks

Arindam