So, new points seem to be (assuming 100% stabs) 1000 for the first, 250 for second and third, and 50 for each thereafter (you get astro credits for all the stabs equal to 1/10th of the points, except maybe the 50pt runs, not sure). Stabbing resets your 80min skill cap, but there's now a hard daily cap of 80 frags (which does not reset by stabbing) (you get the usual 1 astro credit per frag, and you can't get astro credits from skilling after you cap frags).
Not including 50 point stabs, new daily cap is 1900 (1000+250+250 stabs + 80*5); old cap was roughly 1600 but varied widely depending on how lucky you were with frags. Old cap took 100min to reach (20 event, 80 skilling for frags); new caps takes 80-140min to cap (20x3 event, 20-80min frags, depending on your luck).
Folks who stabbed before the update occurred but after today's reset seem to be getting more 250pt stabs than they should.
Edit: It's also looking like it will indeed take the full original 80min of skilling to hit 80 frags, whereas before you could get 80 in a little over half that time. So capping takes a fair bit longer now.