Personally I see myself as realistic, this park was suppose to open in 2020 with permit filing in 2016. This hasn't happened until now, and according to your post they have again delayed the timeline and moved it to 2021.
What makes me more worried is that up to now, no details have been shown on what is going to attract people to the park. If you compare this with relevant projects like Universal's Epic Universe, the filing of official documents show detailed masterplans of what each section of the park is going to be. Up to this point London Resort has shown intentions of what's to come except for concepts with generic themes. This is weird as they claim to have ITV, Paramount and BBC behind them for IP's, so where are the IP inspired concepts?
They are asking people to sign off on the DCO with no knowledge on what the both parks offering into the mix of all hotels, E-Arena and other side offerings within a resort. Basically they are now selling Disney Village with the hotels without telling what the parks are.
I would love to have a resort 30 minutes from my home, but let's be realistic, this has been going on since 2015 without any construction as of yet.