I have a bad theory. That those that are complaining of the data drops, are getting the same bad phones that were returned over and over again.
It could be a combination of bad phones and/or bad 4G LTE SIM cards.
As a former bionic user, I think this is probably the case, there were probably a large number of faulty Bionics that were returned, only to be shipped out to other people. I had a Thunderbolt replaced with a Bionic, no data, had the Bionic replaced with a Stratosphere, screen was detached, had that replaced with another Stratosphere, would not make a phone call, had that replaced with a third Stratosphere, finally had a phone that worked. Bought my wife an iphone and took her Thunderbolt, because all of the replacement phones I got were poor. (the working Stratosphere was just too underpowered)
I'm not sure what Verizon does with the CLN replacements, but I'm pretty sure fixing and testing them is not on the list.
I think the only time you get a non defective phone is when, by the luck of the draw, you get one either "out of the box" or one that was returned inside the 14 days for personal reasons. Otherwise you are just handed someone else's problem.
I have a good friend with a Bionic, he loves it, I've used it and it works great, my experience with my Bionic was frustrating to say the least.
Sent from my Illudium PU - 36 Explosive Space Modulator.