Why this is a win for Local Civic and Cultural Organizations

I want to analyze this proposal from the perspective of Local Civic and Cultural Organizations. There's a civic proposal to convert the WSCC Arch building at 7th & Pike into a year-round public commons operated by Seattle Center. The case being made to Local Civic and Cultural Organizations: 435,000 square feet of civic space managed for the public good. If Seattle Center operates the Arch with the same programming philosophy as the main campus, this is the largest addition to Seattle's civic infrastructure in a generation. Organizations that currently compete for limited nonprofit venue space gain a new home in the heart of downtown. The Arch's scale means room for organizations that have never had a permanent home in the core. The full proposal: https://commons.conventioncityseattle.com What are the strongest arguments for and against, from Local Civic and Cultural Organizations's perspective?