Good to see others would like to see some change in this area also. What about this for an idea? I understand 'auto generated' mapping could be cost prohibitive and complicated. There is currently a 'charts' function which shows SIGWX and other chart style information. What about a ML/BN SIGMET chart/s? Every time a SIGMET is updated the chart can be updated and accessed electronically.
Likewise a NOTAM chart/s where MIL LJRs, drones, survey operators etc can provide a chart for publication (or a basic one can be drawn) and then published. The text NOTAM can be generated as is the case now but there can be reference made to the relevant NOTAM chart. A slightly different version of this is exemplified by the recent AIP SUP H134/13 military TRA. There is a text NOTAM out but it also refers you to the AIP SUP which contains a lovely colour VTC excerpt showing the area concerned.
I for one would be more than happy to take a quick scan of a SIGMET and NOTAM chart information pages in addition to text WX/NOTAMs.