Thank you for the kind words! I'm glad you are enjoying the SF3Patch.
V17 is far superior to V15, so you should find it even smoother.
The time til official completion depends to a large degree on the availability and production of volunteer, yet quality translators. These volunteers have tended to be scarce, but we do currently have one producing part-time. Thank you Anastasia! I do have a lot of work left to do myself too. It's hard to put a timeframe on it. I'm personally 9 1/2 years in. It's the nature of a volunteer time-consuming project such as this. It generally goes slow.
I'd say if you are just worried about understanding the story playing it now is fine. Then when it is finished, you can plan to play again to appreciate the art that is the SF3 Translation Project. It will be like reading the book after seeing the movie.