But the large majority of texts is now typed, not handwritten. I'd optimize a writing system for fast, easy, error-resistant reading. The Latin script reads easier than this, despite its known problems, maybe because Quickscript lacks the 27 centuries of refinement.

If I were to pick an existing script, that would be either Hangul or Tengwar (with vowels). Tengwar already has an English mode, and Hangul would likely need a few adjustments, following its general principles.