I wonder if there is an architect whose portfolio of courses would be better enhanced by sympathetic renovations than George C. Thomas. Riviera is the last of his big three without an extensive restoration. In addition to Ojai already mentioned, the following clubs/courses would be interesting candidates for a hybrid redesign/restoration: La Cumbre, Stanford, and the LA municipal 36 complex at Griffith Park now known as Wilson and Harding. Perhaps Yale's restoration will spark some productive envy among Stanford's golf boosters.
This idea is echoed in Andy Johnson's most recent Fried Egg podcast with Geoff Shackelford on Thomas. But, apart from restoring Riviera, taking a page from Cal Club's redesign would be better suited to revitalizing Thomas's degraded designs.