Mode 2 uses a laser or IOG to get the missile within the target area and then its FnF during the terminal phase. About 5km. It would mean you wouldnt need to guide the Brimstone in for its entire flight which means you wouldnt need to remain exposed and vulnerbale to anything and everything for well over a minute
Coupled with Brimstone 2s which are much faster. Wed actually have something comprable to the AGM-65
The GPS change was an intended part of the update (as per the notes). If a specific weapon has clear evidence of a specific accuracy, then it can be reported as a suggestion.