I'm also looking forward to the D&D Next approach to mooks. I'm a big fan of 4E in general—it's the first edition I DMed regularly—but I never found minions entirely satisfying. (Don't tell me, I must have been using them wrong, right?) I think there's too much of a gap in staying power between a level-appropriate minion and a level-appropriate standard monster. In my experience, players inevitably begin meta-gaming. Once a monster survives a hit, they know it'll take several hits to bring down (or they need to aim their pixie thief at it or whatever).
I like that instead of having all the monsters with level-appropriate attack bonuses and AC fall into four buckets of toughness (minion, standard, elite, or solo), all the monsters will have roughly level-appropriate attack bonuses and AC, and there'll be a full continuum of hit-point totals among those monsters. Seems more natural to me.