The site plan approval and minor change approval are procedural milestones for the project regardless of the state of what the developer is doing.
In this unique situation, this approval may mean nothing, and the project might be doomed entirely due to the fact that Lendlease is pulling out of the project and selling the site. However, this news may also be helpful in securing a new developer to buy the land/project because this means they have a fully entitled development with permits already in the works that they can purchase and have a lot of the heavy lifting already completed.
But also who knows how long it would take for a new owner to come along..