By the way: I see some rails with bicycle=y or yes here. What does it mean?

Well, sorry for sounding bold. English is my 2nd language. It seems that "LPI NSW" sat images are out-dated in this place as they show the road and the rails at a different position. Maybe look at node/2347313297
This was also created by you and corresponds to the wiki reg. the highway=crossing tag. I just don't understand the tag ramp=both on it.
Maybe something like kerb=lowered as in
osm.wiki/Key%3Akerb ?

You see? No mention of highway=crossing to be used on ways here.

Don't think so. The wiki separates clearly between nodes and ways. Please review.
crossing=*
I refer to "The tag is set for the node where the both ways are crossing (footway and street, street and railway and so on). For detailed mapping it may be useful to tag ways leading from a sidewalk to the crossing node with footway=crossing or cycleway=crossing as appropriate. "

Sorry, you lost me. Do you want to establish a new tagging system here?

Hi!
Please review way/174901199
I assume you meant service here. I did not correct it because there is also a barrier=gate which is unclear. If you know this place please place the barrier node so that it is not a junction of two different highway ways. See also barrier=gate

For the way itself the common tagging uses
highway=footway + footway=crossing.

Hi!
I've noticed this change because of the tag highway=crossing which is used on a way instead of a node. Is Go Map! encouring you to use this wrong tagging?
See crossing=*

Hi again.
Please make sure that you don't use highway=crossing for ways.
The tag is only for the node where the footway / cycleway crosses a major road.
The footway is mapped with highway=crossing + footway=crossing
way/524247989#map=19/55.58932/37.72798

Hi!
I changed the mapping of the footbridge, see
changeset/52057414
and
https://github.com/openstreetmap/iD/issues/4309

Hi!
Please review relation/3612718
Why did you use highway=unclassified
for it?

Hi!
It seems that you accidentially changed a complex natural=wood multipolygon into something that is now also a bus route.
Also a landuse=residential MP was broken.
I tried to restore the old data with two steps, see
changeset/52041398
and
changeset/52041694

I just try to make up my mind what a highway MP is when it comes to routing.
I found many MP which don't describe the same thing as a way with area:highway does. So I think you removed information.

Hi!
It seems that you changed some outer ways which were tagged area:highway=*
in a way that the modified MP relation now has highway=*
I think you should have kept the old tag key.

Hi!
Please review relation/5359290
It is now a highway=secondary MP relation, before it was a area:highway=secondary
Same problem here:
way/360013111
Did you do this change im more places?

Hi!
The tag highway=traffic_calming
is rarely used on ways, can you please explain what you tried to map here?
Maybe you meant maxheight for the service way below the bridge? maxheight=*

Hi!
I found a typo highway=residental here
way/522967074
and tried to map more ways. Please review
way/522967076.
It seems to cross many buildings. Maybe
Bing is outaged? I used Bing with offset 3.58; -5.97, my changes are here:
changeset/52001458

I changed one more highway=crossing here:
changeset/51996750

Please review my changes here:
changeset/51996550

Please check changeset/51995601