I picked mine up and I'm not very impressed.
The BLADE ZMAX camera SUCKS in low light. The ZMAX PRO camera is better in low light.
No "slow motion" option for video like on the PRO.
As far as the display, in my opinion the PRO has better color tones (the WHITE levels seem truer). Turn both phones to the same brightness and set them side by side and view a white page and black text. The display on the PRO is better.
When you download an image from Chrome, it doesn't appear in the GALLERY.
The text messaging app doesn't appear to be visually configurable (image backgrounds, changing colors, etc).
QuickCharge 2.0 doesn't seem to charge any faster than 1.0 on the PRO. Still seems to be 1% per minute. But the battery is larger, so I suppose it's a bit faster but it takes just as long for a full charge. I'll give the battery a good usage test tomorrow.
Speakers are a bit louder than the PRO, but not significantly. Still a let down.
Touchscreen does seem a bit more responsive on the BLADE.
UI TUNER is available when holding the settings "gear" for a while and releasing, but it doesn't look like we can remove the "MetroPCS" text from the status bar.
Overall, at this point, I'd say that I was wrong in suggesting it's worth the upgrade from the PRO. The updated OS is nice, but maybe they'll finally root the PRO and get that phone up to date.
I'll keep updating this info, but at this point I would not recommend PRO users upgrade (unless your phone is broken or having issues).