Hey, this is my second year applying to schools. Last year I applied to 6 schools, rejected to 5 and waitlisted to the last one. The things hurting my application last year were my GPA and observing experience. I was working as an aide since I graduated college, so while I had tons of experience in the field, all of it was in one setting of physical therapy (outpatient ortho). I scored pretty decent of the GRE, so I didn't bother trying to retake it. I was working full time, so retaking classes weren't a feasible option for me.
So over the next year I did the following to improve my application:
-Diversified my observing PT experiences and in hospitals, nursing homes, etc.
-Revamped my PTCAS essay. Made grammar changes, added in new experiences, and really geared it towards expressing my passion to the field.
-Talked about new responsibilities acquired in my aide job (becoming inventory manager, learned some spanish, taught modality protocols, new aide training)
***I also picked schools with more forgiving GPA requirements and also took a high percentage of out-of-state applicants.
After these improvements to my application, I applied again this year and noticed a much better response from schools. So far I have been offered 4 interviews (2 of which I turned down), 1 acceptance, 1 waitlist, and 2 rejections.
Send me a PM if you have any other questions, I'd be happy to help you out. Good luck and hang in there!