I was wondering the same thing which is why I wanted to ask advice from people who had experience wearing something similar and of that size. I'm not a "diamond" person in the sense that I'm not into diamonds. I don't own any. From a design standpoint, the solitaire diamond is just not for me. The only diamond look I happen to like is the full eternity one. It's an aesthetics thing for me. Perhaps .7 carats per stone is too big... again, I have zero experience with this so it's hard to judge. Maybe it's not meant to be an every day ring. I guess trial wearing is the only way to know for certain. Maybe I'll go half carat per stone... but in hindsight it's only a half a MM difference which is minuscule...Honestly it sounds like a bad idea for multiple reasons. You say you are (awkward) not easy on rings, you want to pair with your wedding band aka every day ring, and with a size 4 ring, 8 carats is going to be overwhelming (bulky aka uncomfortable) on your finger. The other thing that confuses me, you say you are not a "diamond" person. An 8 carat eternity is an extremely blingy ring.
I think you are going to have to go much smaller with the stones.If you go a full eternity, be aware of likelihood of damaging the stones. EC stones are more vulnerable to damage than round cuts due to the flat tables and sharp edges.
My view? Start over. Try on a bunch of rings in person, including different cuts. Include eternities, but also 5, 7 stone and half bands, as well as bands that are mostly metal with stone accents that go all the way around. I think you are likely to find something that you like, that is more comfortable and doable as an every day ring. Or, take your idea and scale it way down. If same size stones, a 5 stone ring. Or use much smaller stones so there is proportionally more metal protecting the stones.