I don’t think it matters much if the speakers are pointed directly at you or not. If you’re a bit off axis, the receiver’s auto-calibration will make the volume adjustment so they’re all equal-ish.
Likewise, it’s ok if the rear speakers are a more direct angle than the front, the level should be set a bit higher on the fronts to compensate.
My arrangement is height speakers up in the corners of the room but since the rear corner of the room is much closer to the couch, I set those as top-rear and the fronts as front-height. Sounds great. I have the rear speakers toed in a bit toward MLP and the fronts face straight out and down from the ceiling directly over the screen.