Nice little summary: https://www.alexirpan.com/2020/01/16/berkeley-back-pay.html
So 8 hour/week EECS TA positions will go away.
More 20 hour/week or even 30 hour/week undergrad TA positions. Maybe 24 hour/week positions.
And yes, less capacity in EECS classes.
Though probably not a drastic decrease. Though the GPA cutoff to get in seems likely to go up. 3.7 is possible. 3.7 or so was the cutoff to transfer in to UIUC CS. Now even that GPA can’t guarantee you a successful transfer in to UIUC CS. The advice to kids who definitely want CS but did not get in to UIUC for CS/CS+X for several years now has been to go elsewhere.