Deleting bloatware before installing custom rom?

So I just want to understand things better.

I was rooted and froze bloatware and some services I didn't need with titanium. When I updated and lost root, bloatware remained frozen with no option to enable (greyed out). I've since flashed stock rom and am about to reroot then try a custom rom I've read about for great battery life. How will those frozen bloatware/services affect my custom rom? Should I still enjoy the great battery life benefits and improved performance? FWIW, the rom is xtresolite that I want to try on my gs5.

Thanks