don't exactly know what you say doggy out of the corners. I understand the term, but for a brushless one start this is confusing. I can't directly relate you could say, I have a 9 turn neo one, the original reedy brushless which snaps on the dot. The one star being an 8.5T, seems like it should have enough juice in it to satisfy any 1/10 owner...? Now I've used a trinity 13T and a reedy 12T brushed and have to say mine pulls better than both by a long shot anywhere on the track.
I question the track, your tires and your gearing. Now if you tightened the slipper, it seems like that would make it impossible to be "doggy" in the corners because you would literally be wheelying out of the corner. Are you the proper tires I wonder? Could you possibly have a weak connection somewhere? This seems to be a bizarre case of an "inferior" brushless motor to brushes, so I question things like water damage, connections, tire, tranny, set up, track, controls, and experience to you. Have you ever used anyone elses brushless reedy? I think you should maybe make a first hand comparison if possible that is.
True story of mine is that I had some proline dirt hawgs that I recieved used, and they were supposably good....but turns out the glue job wasn't. My Neo One ripped the tire from glue from use, and they started spinning, and I noticed that my stock holeshots on my t4 that were bald(also the neo to blame
)out performed my dirt hawg prolines. So I held the back of the car in the air and saw foam, all this from about a few weeks use. This is why the little things count that you don't expect.