I originally had this at 4.5. Now 2.5, this was way worse than I remembered. Also gave up on it near the end. I got to the point where I finished the first (yes, there's 2 of them) Goliath and the next part was unlocking the UFO for the house. I just couldn't be bothered once I saw what came later was the Second Goliath (2 laps of the existing one) and a winner's trophy to unlock after that.
Like so many of the challenges are so tedious and grindy that even reading their requirements made me feel exhausted. It just didn't feel worth it going that far a second time. Definitely not something I'd recommend 100%'ing, but just messing around in for a bit can be fun for a while.
Still, nowhere near as good as Fortune Island. My FH4 bias really doesn't help this one. It just felt kinda boring.
Also, I do not agree with "it's bad because it's Lego". While I can see how it's a detriment to the map in some ways, I never thought the branding was what ruined it. I think it's just not very fun.