additional QOL suggestions: pipes should also be on the side panel with roads and bridges. when in the pipe placement overlay, a color coded outline that highlights buildings that can draw from pipes, and changes colors to indicate if it is connected to the grid or not
so i pretty much havnt stopped playing this for the last two weeks. im on all but 1 island and have a pop of 4200, and am working my way towards the final few techs. if my obsession isnt obvious, let me say i have loved every moment of this :)
a few ideas of things I think would be cool to see:
QOL ability to build new house types over old, in the same manner as with roads
a science (after limestone roads maybe) that upgrades bridges to be able to span medium depth water as a way to make the next logistics improvement by connecting islands.
there are a few items that aren't stored in any warehouses, and as such can not be transported easily, (if i want set up a small industry somewhere away from the farm or mine say) wool and bronze being two examples
 "City Idle"){kind=icon}
 "Glean"){kind=icon}
 "Protector IV"){kind=icon}