The Outer Sunset could still end up with a very tall, somewhat out-of-scale new residential development on the site of Sloat Garden Center, where a previous developer had proposed an insanely tall, 50-story tower.The new proposal comes from a new development team which is seeking accelerated approvals from the city under AB2011, the state's new law that mandates streamlined permitting and relaxed density limits for code-compliant projects with a certain number of affordable units.The development, as the Chronicle reported Tuesday, is proposed as 446 units, with the tallest section of the building being 22 stories, facing Sloat Boulevard.The unit mix would be 94 studios, 173 one-bedroom units, 120 two-bedroom units, and 59 three-bedroom units, and would include a total of 207 affordable senior rental apartments. The remaining 239 units would be for-sale market-rate condos.The plan includes a stepped massing that brings the complex down to six stories on its north side, at Wawona Street.