There should be a complex dynamic system at play between wholesale generation, load, and transmission expansion where all sectors of the market influence the direction of each others trajectory in the phase flow. Load siting to best serve their end use, generation siting to best serve load and transmission siting to best minimize future and existing congestion. This is naturally occurring behavior under free market conditions.
Instead we have a transmission planning paradigm gated by regulated utilities whose incentives are not sufficiently aligned with consumers thereby creating the mess of grid lock and inefficient grid planning outcomes we see today.