I think one of the most important factors that must be taken into consideration while any upgrade is being considered is to make sure that the unit does not miss a page when the correct tones are dropped. This may be why so many requests that are being made for new features are falling on deaf ears at Unication's R&D team.
The underlying point is that the unit is a pager and it is designed as such. I have five (5) of them, four G5's and one G4 (and currently considering in buying another) and none of them have ever missed a page. I scan one system, or one site, per pager in my county and surrounding areas. If Unication wanted to make a scanner, I believe that they have all the necessary ingredients to blow Uniden and Whistler right out of the market. I believe I speak for everyone here when I say that these units are just that good.
However, if Unication were to consider making a scanner receiver, most, if not all, of the same features that folks are asking for now would be requested for the scanner as well making the scanner and the G-Series pager one in the same. Somehow, I don't think Unication wants this to happen or it would have been considered years ago. We have either all made, or thought of making, a request to Unication for certain features and upgrades we'd like to see in future firmware and, believe me, I understand the desire.
I started in the hobby in 1985 with a new Regency 30-channel base unit and telescoping antenna. (It was more expensive than some crystallized units that were still on the market at that time). When my county went to simulcast trunking in 1989, I bought a "super converter" that changed frequencies in the 400 MHz range to 800 MHz range so that I could continue to monitor traffic by constantly hitting the scan button to follow the conversation. I thought then that if the portable and mobile radios could scan trunking systems, a scanner should be able to as well. Fast forward 30 years and look at what we have today. I don't think there's much of an argument that we should be patient with Unication's team and let them roll out the features in their own time.