I noticed almost my first week that the placement 'rules' for structures were not commutative. That is, you could place things in certain formations if you moved one structure, but not another even if the end result was the same. Namely you could move the ends of barricades flush against almost any building thereby incorporating that structure into an 'unbroken' line.
I didn't think much about it. I just assumed that things like gardens and outhouses were were easy to destroy (and then walk through) and that was why I've never seen anyone else do this. Thus I only used this as a secondary perimeter with wires/stakes barricades, which are also easy to destroy.
My problem with this update is that over the months I BOUGHT 28 Tire Stacks and Flaming Oil Drums to place between my barricades and in other various places to plug up holes. Note that they could NOT be made flush with one another or non-Barricades, so there was a natural limit to how many (and where) they could be used. I also used them to channel zombies into Wire Traps.
Now they are worthless.
I normally wouldn't care but I spent 750 fuel (two of the tire stacks cost 50 not 25) and now I can't use these stupid things for anything. I'm not sure you (CON) considered that some structures are buyable, and are now worthless if one (formerly) used them like I did.
I would like my 750 fuel back (I won't hold my breath waiting) or, BETTER yet, allow Tire Stacks/Oil Drums (and other one space BUYABLE structures) to again be placed flush against the ends of Barricades (against ALL 3 spaces as before).
(On a related note, the placement restrictions on Wire Traps, are way too restrictive, and (ironically) you can STILL place them 'illegally' in two of the four directions. I guess you have more coding to do, or undo).