There's also the fact that fan TLs don't always get completed. It's better to adopt the mindset that all fan TLs won't be completed so you're not disappointed in the long run.
This retranslation patch doesn't exist yet, so unfortunately your ideal case isn't an option. The Ageha route is definitely the worst of what happened, since they basically rewrote the story at the same time as writing a ton of Engrish, and at times it is literally impossible to understand. But even outside of Ageha's route, the translation is pretty Engrishy at times, though definitely not always.
There is an "H scene restoration patch" out somewhere, which just restores those particular scenes to the Steam game but doesn't try to address any of the various other problems with the translation. It also has some weird bugs (for instance, there will probably be a duck in your H scene; no, I'm not kidding).
I played the game without any patch. In spite of all the problems, I really enjoyed it. Fan translation projects in general have very unreliable time tables, so it's hard for me to recommend someone to wait on one, especially when the game is still enjoyable as is.
xaeroxiii reacted to DoodlyNyan in Grisaia no Kajitsu Amane Route Bad End Spoiler