How long do you think it'll be before the VN version ready to play? I just got up to the free roam part and as much as I love this game, I just can't sit through it, it has got to be one of the more tedious navigation mechanics I've encountered, but I don't want to miss out on content.
I mean, as shown in Ombra mission back in v0.07 & v0.08, there are clearly storyline being told through the freeroam gameplay (such as Caterina & Amata banter in v0.07 during the mission navigation, or MC, Gracie, Zoey, Luna interactions during the missions navigations as well).
So you're still missing out on content, just that you wouldn't be missing VN parts of it (Which gets available through either Just Story mode or VN mode).
It's just how it is.
There is a reason why the first mode is called "Full Experience" mode.
As for the other modes availability, who knows (about how long the wait will be)? Only Hopes would know that.
Though given Full Experience will always take priority over others, with every update which has gameplay, I'd say you'll need to wait for some time before other modes become available (and iirc, it's only the Just Story mode that's available and pure VN mode isn't even available yet?).