They weigh gpas heavily because that is what the AFROTC board weighs heavily. It won't end there for EA, but again for AFSC, so keep getting better and better grades.
I am not one of the mindset to say join another branch for scholarships. 4 yrs AD in a branch you didn't want to be in to start with is a steep price...especially if they send you to Korea or the sandbox for 12-18 months.
There are a tone a loans, grants, etc out there besides the military.
ERAU does give out the highest amount of candidates...however, I do not believe statistically they give out the highest percentage...purely based on the size of their det.
I believe last yr when the SFT board was released for CS200's they had @50-55%.
DO an eyeball check around your det. If you are in the top 50% for gpa, than you should be okay.
Good luck.
OBTW I know you are anxious, but you need to just say to yourself I gave it 250%, I gave it down to the last drop of blood. If you can say that, than no matter what happens, you will know you tried and this was just not your fate at this stime.
Also, AROTC is not a safe bet anymore like yrs past. Currently they have already stated that this yr they will be decreasing the amount of scholarships awarded drastically compared to LY (I think it was @700+); it is either clarkson or Marist that have stated their BN scholarships will decrease by a lot of cadets. I also believe on the AROTC thread they stated Army is expect to reduce AROTC rolls by 32% in the next few yrs.