Hi!
Nice work on tracing the buildings. One thing to keep in mind is we don't tend to put people's names in or other personal data - I'll just edit those out now. Keep it up!

Maybe its confused with Southbank Zone Substation; which is nearby?

Might be best to tag the overall relation as a cycleway/cycle route; so it shows up on https://www.opencyclemap.org/ better

I've cleaned up a few of these - thanks for the effort, and welcome to OSM!

You might be interested in using the 'square' tool in ID to make neater outsides, you can access it via right clicking or using 'S' as a shortcut key.

As others have said, if you type 'House' into the search box on the upper left, you'll get the right tags for a Building (rather than the name)

Hi! You might be interested in improve-osm.org or the JOSM plugins for it to find unmapped roads in this area

Hard to decide if this is a Sidewalk, or a Pedestrian area - its all kind of paved and merged together with the benches ontop of it.

You might be interested in tagging individual turbines (visible on digital globe imagery) - node/5008627113 is an example

With this, I traced roughly where the whole business is and moved the address/business name tags to that, left the building attributes on the buildings.

With a lot of these, I marked them as a delivery company office or similar

Fixed

Hi, welcome to OpenStreetMap :)

I changed this from a 'path' to a driveway, and added the houses either side.

You might like to add addresses on the individual houses instead of the driveway itself - that will make it show up in navigation apps and similar that use OSM.

The prision is available on digital globe, and appears substantially constructed now

Should probably be building=hospital if its still a hospital, or building = yes if its not anymore

This is actually Beech Avenue according to http://maps.sa.gov.au/plb/ (that is powered by the same data as is on data.sa.gov.au; which we have explicit permission to use)

I've removed this for now as it seems very unlikely to be an actual confectionery store

I've removed the service roads for now; we'll add a user note to recheck this when LPI imagery catches up to whats on the ground.

Unfortunately that's copyrighted / not compatible with the OpenStreetMap licencing.

SOme detail on it - http://www.haveyoursaywilloughby.com.au/gore-hill-exercise-equipment

I think its better tagged as leisure=fitness_station

You might be interested in https://improveosm.org/#background=Bing&id=w458133607&map=16.64/25.85501/-100.14083 - you can see a lot of roads in the new residential area