well, i'll probably come back to the normal version
I had trouble accessing online feature in FE fates (something about ban error code), so i tried the dev version.
Then i still had the problem.
Finally it appears that the problem occured because my FE cia has restoration patch. So i tried online feature with my retail game and it worked, but i've never known if being on dev version did something
Anyway, i'm sure i was able to access Eshop few time ago