(Kevin) We discussed two top-level a11y concerns (e.g., using proper HTML/ARIA semantics and providing equivalent access for keyboard and touchscreen to the full title display on mouseover). After reviewing WCAG Success Criteria, I need more information on expected use cases to understand possible additional issues with both SC 1.4.10 Reflow (added in 2.1) and 1.4.4 Resize Text.
Quick look through “best addressed by breaking change” list