Ah, great. Well, I can fix it myself (got the world into CAW) but perhaps for future revisions:
- The intersection at Carl's Castle is not connected properly
- The intersection at the Union Fire Services is not connected properly
These are CAW issues but they're really easy to fix, if you so much as touch the road it will connect.
The Hitching Posts at The Grange are placed using MoveObjects apparently, but they "stick out" of the lot and this tends to trap Sims. The same goes for the City Planter Boxes at the Graveyard. It is a shame really as this looks VERY good, but it does throw off the routing for Sims making use of the sidewalk.
Very oddly, the Bistro doesn't have the "Bistro Rabbithole" sounds but apparently those of the School. It looks like just re-placing the Bistro on the lot fixes that, either in a savegame file or in the CAW/Edit In Game stage.
I'll report more if I come across problem areas but so far it's actually remarkably smooth.