Is Alpha really that good that she's considered a definite Top Tier? She seems like she can get hurt badly if someone rushes her down and puts her on the defensive. Characters with good TC abilities like Helena or Ayane for example can limit the use of her i9 jabs or KKKKK's, etc. when in fairly close. She is nightmarish in the damage department, but she's essentially at your mercy if you stun her or knock her down into a corner. Basically, either she does big damage to you or you do big damage to her (it's also never worth it to get hit by a Hi-counter 236236T).
She prays a lot on character ignorance and the belief that she is nothing more than a "mashy, braindead, noobtube".