yes, under two minutes is not much time, but here is what i see:
pro's:
you are aggressive, make nice use of her ground stomp, and you use her f+4 pretty well. you also used her jump stomp to great effect while not becoming predictable with it; you were only punished once, i believe. very in-your-face...love it!!
suggestions:
1. follow up a successful ex b,f,3 by aiming your victim to the farthest wall, then quickly using a ground stomp. you did this once; the other time you tried unsuccessfully to follow with a dash, f+4. you are nearly guaranteed to land the stomp if you are quick. then either land ANOTHER one, or use a jump stomp (as you did) or even a fireball.
2. follow up a jump in punch (whether it's blocked or not) with f+3. if that hits, follow with either b,f,3 or 2; both options will send them flying, from where you may try for either a ground stomp or jump stomp. if f+3 doesn't land, even better...go for your low grab, then follow with either b+2, 1+2, air grab (much more damage) or dash, 4, b, f, 3 (less damage, but laxer timing).
3. don't neglect her 1, 2, b+1 combo. it is her quickest regular string, sets up a number of damaging juggles, (especially 1, 2, b+1, dash, 2, 1, 2, air grab or b,f,3) and will often cause enemies to duck block. you are all but guaranteed a low grab in this situation.
4. ALWAYS humiliate your vanquished foe with sheeva's humiliating "lend a hand" fatality. ;D