Crocodile, I havent tried this but seeing as UT seems to be using the PCAT and cGPA to calculate admissions, with GPA weighted more heavily, you could try just averaging your PCAT percentage with your GPA (in terms of percentages). You can extrapolate and 'acceptance average' from this method.
For example,
I had a cGPA=3.08 with a 89 PCAT.
my calculated academic average was 75.8ish.
89+75.8=82.4%
then i can just assume my 'acceptance' average is less than 82.4%.
another example would be mug3n's stats:
cGPA=3.10 with 91 PCAT
3.10 cGPA = 76ish
his 'acceptance average' is around 83.5%
Now for you:
cGPA=3.3 PCAT=79
cGPA average = 77%
your 'acceptance average' is about 78% although it might be higher than that! (depending on the weighting!)
This is a very very rough estimation! But if you havent gotten off the waitlist yet, im pretty sure you will get off pretty soon! (your 'acceptance average' is really close to those that have already gotten off the list)
Then again, UT also uses individual sections of the PCAT in their admissions i think.
Those that have cGPA=3.5 must calculate their average manually, since 3.5 can be either a B+ or A-
I hope this makes you feel a bit better