I was in a rush earlier, so here are a couple of answers:

Yes, the Pete Fenlon revisited style was working fine for me, and I believe the DD3 and CD3 icons are installed as a way of giving you fast access to the dungeon and city tools on the tops of the toolbars on the left - drawing rooms and walls, or using the House and Street tools depending on what you are doing. Although you only have CC3, you do also have built in Dungeon and City styles that you can use.

Who wanted dead trees and ikky bits?

This looks as close as I could get to an illegal uncontained slurry pit among the consequently dead trees. Just missing the cart tracks, but since this is only a test site I won't bother with them right now.

Try hiding the STRUCTURES(COLORS) layer and see if that makes them go away.

Ralf Schemmann has very kindly checked the adjustment I made and created a new symbol catalogue. This will be included in the installer when it is next updated, but he said you could have it now.

All you need to do is use this copy to overwrite the one of the same name in this folder:

C:\ProgramData\Profantasy\CC3Plus\Symbols\Cities\CA177 Darklands City

Oh yes, the hedge pieces are all rounded off at the end, which means the end happens whenever you stop. There isn't a round end on the first part of the hedge, but you can approach the gate from the other side.

I haven't done fences. They seem to be much less common in medieval times. I suppose its because making a wooden fence with wooden bars (no wires back then) would have been too time consuming when you have plenty of rocks lying around for a wall and a hedge grows without a problem. It's also because they don't work well with the same shadows as the walls and hedges, so I would need yet another sheet just for the fences.

But I can make a gate symbol.

Round-ended hedge pieces

@JimP that's a good idea :)