1) The Swiss accounting localization in Odoo provides key features for Swiss accounting including the chart of accounts, VAT configuration, financial reports, bank account creation, printing of ESR/BVR and QR payment slips, and payment reference auto-matching.
2) Community modules add additional functionality such as importing bank statements, generating and sending electronic invoices in various formats, and creating supplier invoices by scanning QR bills.
3) Future improvements could include better support for SIX E-Billing standards, adding English translations, and integrating the SIX b.link bank synchronization service. Odoo offers a comprehensive Swiss accounting solution that continues to expand its capabilities.