“are far from ideal and rely on several קוּלות, meaning many people won’t carry there.”
Carrying or not is not the issue, as per Shitah Mekubatzes (in Betzah) and many Poskie Achronim, there is an Inyan to construct an Eruv to prevent people from mistakenly carrying or for the needy.
You can be Machmir and not carry. Rav Chaim of Brisk did not use the eruv in Brisk but he still made sure there was an Eruv.
The issue with “קרפוף” is by far new, and all achornim managed to deal with it.
Again, unlike Brooklyn, as per the Shulcan Aruch there is clearly no issue with Reshus haRabim, it is no different than Yershalayim and many other towns. Unless you go with the Chazon Ish (who holds that cities have less of a problem) Rav Moshe did allow an Eruv in Kew Gardens.
In addition, I am sure there is a way to add to many developments “Dalsos” (haRaos linal) and close it off once or twice a year.
“in Lakewood you are dealing with a situation where as a matter of principle “it has never been done””
The mesorah did not start in Lakewood. Did Rav Ahron leave some kind of a Tzavah and psak that never can there an eruv be constructed in Lakewood? I know he did hold (and written) that Manhattan was a reshus haRabim but that is not relevant to Lakewood.