Console has nothing to do with anything being talked about.
As the OP said, it took almost a year to make an update of half a dozen trees and rocks, that can only be explained but either uninterest or development complexities.
I think Frontier does show interest in their games so the natural conclusion is that technical issues where to blame. And that technical issues to implement just half a dozen placeable trees and rocks are bound to be related to the game's core and bugfixing, because implementing such inanimate objects just can't be as complex and time-consuming as creating and coding new dinosaurs (something we know they were doing too, sadly). So the game's core was tailored to meet the console's hardware, which is obviously limited, and the second handicap is also due to consoles, because multiplatform is bound to complicate everything if only due to it multiplying the testing time.
So, yeah, console's are a huge break for JWE. So I don't really see the point denying that. Maybe they do win FD and Univerdal money, but if the end result is something such as JWE just launched, a potential JWE2 will likely lose most, if not all, PC players so it's also a big loss.
Anyway, PCs can be upgraded. Consoles can't? Sorry for you, but you'd better go ask Sony, MS and the rest of them for the ability to do so, then, and not expecting everyone to be happy with such a substandard product. This ain't the 90s anymore. I promise you, someday you'll get your hands on a PC and you'll open your eyes (it happened for me and every single player I know in person)
Having said that and with no spirit to offend anyone (really sorry if I sounded harsh, but the truth often stings), I don't see why adding an option for lifting the map's limits would be unfair. The game would still be the same for everyone, with the sole excepcion that those who can't handle certain map extensions (PC users included, not all of us own super-huge gaming ones) will either have to accept their limits or risk having lag and potential crashes.