A good rule of thumb, would be to always run one film trough a new camera, fired at various distances and apertures (and shutter-speeds), to check the over-all performance and sharpness.
Most likely, your viewing-lens needs some adjustment, or that or your ground-glass may be upside down or mis-aligned. (I had that on my 2.8F, which has a removable ground-glass).
You don't say where you live on your profile, but you can find very reputable service-people for Rolleiflex, all over the world, for example on this page:
You can also google specific people, when you've decided who you'd like to use, as most people on that list, has reviews and experiences scatted around the Internet.
Too bad your Rolleiflex is not 100%, it should be very nice and sharp and contrasty. My very old Rolleiflex Automat 3.5, is very different and much sharper than my Yashicaflex, I can tell you.
The first half of this blog-entry, has some shots with my old Rolleiflex Automat 3.5, absolutely love it (and use it more than my 2.8F, as it is so much cheaper, uglier and less likely to be stolen out of my hands in various European cities) http://helino-photo.blogspot.no/2013...ederation.html