As I don't think this is currently possible, I'd like to put in a request for a firmware update that allows us to turn off the phase meter and the BPM reader (or at least the decimal point on the BPM reader)
My reason for wanting this option is two fold. First of all and most importantly, I really enjoy beatmatching by ear and like keeping my skills sharp, but when the exact bpm with a decimal point and a live sync bar are staring you in the face, you can't help but see them. Then you already know exactly which track needs to be sped up or slowed down. It takes the skill out of it and takes the fun out of it. I've tried putting some tape over the BPM reader which works, but you can't do this for the phase meter as you need that part of the screen in other views. Besides, we shouldn't need to resort to putting tape on units that we pay so much for.
Secondly, I find it's actually a hindrance when I'm playing sometimes. As much as I try to ignore the phase meter, there have been times I've seen it and it has looked a little bit out which has caused me to second guess myself, and actually put the track further out (this is probably because I usually don't get around to editing beatgrids in rekordbox so a lot of them are a bit out). This is a pretty easy problem to solve by just trusting your ear and ignoring the phase meter, but I would prefer to just not see it at all, and I'd imagine it wouldn't be too hard for pioneer to give us that option.
From speaking to other DJs I think there would be universal support for this option in a firmware update.