Judging by that document, a decision has been made. Seems strange the decision hasn't been made public yet. I don't know how the planning permission applications process works, especially for projects like this, although I would assume it differs between each council. In this case, I guess there is a fixed amount of time between the decision being made and it being publicly announced.
I have some experience in planning applications and generally it's a fairly open process, so if it had been granted we would know by now. Generally this silence means there's some to-ing and fro-ing between the applicant and the authority.
From docs I've read, there have been objections to the scheme by Mayor Of London. While they are enthusiastic about ITV building a shiny new base on the south bank, there are some parts of the scheme that don't altogether fit in with their "London Plan"
For instance, ITV has proposed that 10% of the apartments will be affordable housing. MOL would prefer nearer 40%. Now, 40% may seem unrealistic in that location, but what could happen is a trade-off whereby ITV agree to provide affordable accommodation on another site nearby. MOL have also asked ITV to propose a contribution to improve certain local amenities in order to allow for the increased number of residents the new block would bring.
Initially the new complex was designed to have some sort of integration with Garden Bridge which would have been right next to it. From what I can understand, the This Morning studio was meant to overlook it, but now the bridge is kaput, ITV have kind of patched up the proposed integration into something MOL want rethinking.
Finally, MOL is concerned about the demolition of the three main studios and the effect it'll have on television production in the capital. ITV have argued that the closure coincides with the opening of TVC and Riverside and these will accommodate the displaced shows. MOL is not entirely satisfied with this (it would rather be growing the industry than just about scraping the same square metres of studio space). Basically MOL have said, if this new HQ is going to be a hub for media production, this could cause an increase in demand for studio space and ITV shouldn't be caught short. They've been encouraged to engage with Film London to explore the options should this happen (such as investing in some studio facilities elsewhere in London and hiring them).
So yeah, ITV has its work cut out.