Disclaimer

A lot of changes here are basically nitpicking, but more importantly, they are mere suggestions. Cherrypicking is absolutely fine with me.

Specific points

Changed formatting for Guy de Spiegeleer's entry in the authors list, as the recommended format (with given-names, dropping-particle and surname) was doing something terribly wrong to affiliations in the compiled paper (previewed on the Whedon service).
In the last sentence of the summary, "mode transitions" seemed better than "phase transitions", as the word "phase" is tainted by various semantics (think wave physics vs thermodynamics, for instance).
Statement of need, paragraph 1: Promoted the agility of the design process as a stringent need instead of a desired feature.
Drivers, last paragraph: Removed mention of non-existent (sub)section "Design and Simulation Features", probably dross from a previous version.
Dynamic and multimode systems, paragraph 3: Replaced "dedicated" with "tailor-made", which is way more telling IMO.