The mistake, I believe, that Uniden made, was trying to mesh radio scanners with 'I'devices.
I believe this is accurate, however, I think it was more of an intelligence issue.
Uniden was developing new radios when the Radio Shack Pro-107 brought a new era to the market. I'm sure that corporate espionage gleaned information the GRE was developing a radio that utilized SD technology and "simpler" user interface, and that the Pro-108/PSR-800 with database integration and Phase II capabilities was close behind in the GRE pipeline.
That intelligence probably caused a huge bout of anxiety and a rush to finish the current radios on an accelerated scale. The features that GRE was rolling out were attractive and may or may not have been on the drawing board when the information was received. You could be damn sure though that the features in the GRE radios would also be present in the Uniden Radios just for the sake of not being outclassed by the competition. The features that the Unidens would have that were not present in the GREs were probably prioritized to be included or rolled out later, i.e. the HP-1 Extreme Upgrade.
The form factors between the PSR-800 and the HP-1 were much different, and Uniden had the prettier display, but the two radios were on par with each other (sans Phase II in the Uniden). Then rumors started about the PSR-900 being close to release, and Uniden realized they were about to be caught with their pants down, so the x36 line was rushed out the door. No Analyze, WiFi Dongle not working correctly from the vendor, Siren app still vaporware, etc. It was a "we have to beat them to market."
This could have been a glorious coup by GRE. Throw a PSR-800 into a PSR-900 case, trot it out at CES and start the rumor about imminent release. GRE already had a handheld Phase II capable radio, and was now about to come out with the mobile. The big boy on the block was in a bad position and they knew it, so it was full speed ahead on the x36 release no matter what the people that actually made the features work told upper management. What Uniden apparently didn't know was that GRE was about to pull out of the market because of issues in China. The PSR-900 was never released and the x36 line was generating so much backlash online that when Whistler bought the rights from GRE, they took their time to get as much right and working out of the box as possible. They didn't get it 100%, but the complaints were much less than what Uniden was getting.
The world has turned into a place where a person's phone is their lifeline. I'm sure this played into the "i" device model that Uniden was running with. If you could free up a person from the bulky radio and put it onto their phone, it would be a much better seller in the current market. They got rushed and lost focus. I'm sure if they knew GRE was about to go belly up in the scanner business, they would have slowed down and gotten everything right. Instead, we got a good radio that should have been a great radio rushed out the door. If it was corporate espionage through GRE as a last middle finger to Uniden, it was very well played.
I am basing all of this on observation and extrapolation from the known events over the past several years. I may be right, I may not, but I'm sure that I'm going to get torn apart by the fanboys from both camps.