I think, to circle back to a reply I made earlier to someone else that yes, Firaxis did do exactly that. The wall change was one of a ton of improvements made in this patch alone. It just meant that the other things fixed up until this point came in higher on the list of priorities, for whatever set of reasons that we're likely to never understand.The wall change, and a large majority of the changes in the patch were very good and I think most players including myself are happy about that. I'm just saying that bugs fixes and balance changes more than once an expansion would be nice. Especially for issues that have been around for a long time that have known solutions that a single modder was able to implement. That doesn't seem unreasonable to me.
One would expect that large companies with teams of coders, designers, and testers would be able fix things more often than a single dude making a mod in his free time. Yeah I know, risk adverse for profit companies are risk adverse and for profit.