A dynamic theming engine that allows users to define brand-specific rules (colors, fonts, logos) globally. This would help enforce consistent branding across all apps, similar to Salesforce's Lightning Design System.
Why dynamic, in OutSystems you can already define a Front-End Architecture with global defined colors, fonts and logos.
Also this is the second post of refering to SalesForce, why do you want to turn OutSystems into SalesForce. I don't believe OutSystems has a history or strategic roadmap of looking at competitors, and copy what they do.