I'm STILL just baffled as to where DDNfan has a problem. I've been DMing 4E game for two years. My party 'takes multiple short rests' all the time and it's never caused any problems. Even resting after a fight, healing with a cleric's help, and then resting again so that the cleric's encounter healing powers are back... it doesn't break the game because still requires the expenditure of a finite resource (Surges in 4E, Hit Dice in Next) and thus contributes to overall party attrition.
This is even less doable in DDN because 1) characters have fewer hit dice than they did surges in 4E, and 2) default short rests are an hour, meaning taking two in a row isn't really possible if the Bad Guy is about to unleash the demon horde at the stroke of midnight and it's 10:52PM. I mean I guess your players could still do that, but then by all means, they have to fight the demon horde as well as the bad guy.
You shouldn't be criticizing my critique, because actually Second Wind, as written, breaks the 4e-ified version of 5th far worse than it does the default game. Then fighters become insanely powerful, effectively unkillable with zero healing cost other than a few 5 minute chunks.
Good luck trying to run a 4e-style 5th edition game where fighters have full HP all day long, without even having to spend hit dice as a limitation. Then add a life cleric where everyone in the group starts at 50% before they add their own free healing on top.
Imagine a group of fighter X with one 3rd level cleric who, before even activating Second Wind after a short rest, are at 50% or close to it. Suddenly your argument about Second Wind not being enough is moot, since a few minutes later, regardless, everyone is at max HP without spending a single daily spell.
If you still don't understand why this is broken, who am I to contradict you? You're welcome to your own beliefs. But I remember when they nerfed the artificer of his surgeless heals in 4e, and the same errata is going to happen.
I'm going to go start a thread now about Wounds and Vitality, because I've stated by opinion enough already.