The next SG update is tomorrow, given that Ocean is back on track with alternating updates, with a WIAB focus one week (last was Feb 17th) and an SG focus the next week.
So - this is me hoping versus anything expressly stated by Ocean - we will get a SG 4.5 full release as well as a brief SG CH 5 update (number of renders completed and perhaps another 2-3 preview shots the way we did with Mila during the update on Feb 10th).
I'm also 'hoping' that beta testing of CH 4.5 full has already resolved any unexpected logic/pathing problems since Ocean is adding in a second route (the beginning of the Sasha route is getting added into CH 2), and there are other Sasha scenes that may need to be added/modified to create path continuity into CH 5 and then Season 2. I can't see Ocean releasing this next update until he is satisfied that the changes fit smoothly into the existing SG story and good Beta testing is always a part of ensuring a quality update - something I think Ocean has been consistently good at.
We know Sasha's friend has taken on a bigger role and is part of the very early Sasha path.
We just don't know what that role is yet (is she a Shasha BFF and wingwoman or something else/something more - all good mysteries to solve as we learn more about Sasha).
Regardless of whether I am right or wrong on the timing of the release of CH 4.5 full, Ocean had created an absolute gem of a story and I'm looking forward to CH 4.5 full and a chance to see how everything fits together with the new CH 2 content and the revisions to CH 3 and CH 3.5.
Cheers!