It's certainly not my intention to derail the current focus of this thread from how the framework of 4E's structure makes for a different game than "trad" D&D; your analysis of how these scenes (might) play out is fascinating!
Nevertheless, [MENTION=42582]pemerton[/MENTION] posted this regarding how combat differs from SCs in
another thread, a further difference between mechanics like Strike!, DW, and PbtA engines in general versus 4E that was implied in some of the discussion of this matter but rather clearly and explicitly stated thus: "The need for pressure [in Skill Challenges] is fundamental,
because only the players are declaring actions and rolling dice (very different eg from 4e combat or HeroWars/Quest extended resolution)."
Anyway, do carry on with the regularly scheduled program!