ECE and CBBE question

[Xerophthalmia]

I'm thinking about upgrading to CBBE + face/body textures. Right now I'm using Enhanced Character Edit, Eyes of Beauty and a hairmod. I also use XP32 Skeleton with Dual Sheath Redux, Immersive Animations and FNIS for swords and shield on back.

 

From what I've read RaceMenu seems to be more popular than ECE and also works better with CBBE. My problem is that I can't seem to get the ECE to RaceMenu import to work (it says "failed to import....). I used the the guide (from step 6) in the CharGen mod description, but not the mod itself since the newest ECE has an export function build into it. I've grown very attached to my chracters over the years so keeping the faces intact is my first priority. I tried installing CBBE with my current ECE setup and it works, but a lot of the sliders doesn't seem to have an effect on the CBBE body.

 

Any idea why the import function isn't working in my case? Should I just use ECE with CBBE and change the body in Bodyslide instead of with ECE? Is UNP a better option for ECE users? I was thinking about just leaving Oldrim as it is and modding Skyrim SE with CBBE (when it comes out) instead, but I kind of want to change things up a bit with my old characters. Any ideas are welcome. I'm not that tech-savvy so there's probably a simple reason why the import function doesn't work that I just don't know about. :-)