I guess I just don't understand any of the purpose behind these changes. The whole point of Heroic Surge is to make air elementals and trip-spammers (dogs, bezekira, mostly) less annoying.
So...why not - bear with me here - CHANGE THE MOBS? Have air elementals come out of whirlwhind like djinnis do (a suggestion that has been made a couple thousand times in the past couple years), and either increase the timer on trip, make monsters with trip respect the timer (I've been improved trip by the named hyena in the Vale 3 times in 10 seconds), and don't let them spam trip AND improved trip...one or the other. It would also be nice if monster trip actually required a hit roll.
This whole business with Heroic Surge seems unnecessary, complicated, annoying, further breaks down the wall of the monsters and the players going by the same rules, and probably a source of a whole new slew of bugs that won't get fixed for a year. Why take the incredibly hard way, when there's a perfectly easy way that accomplishes the stated goal?