Pericles i think you have being reading to much government media.
It's true however that economy is not likely to collapse, but this is mostly beacuse there is no much left to collapse.
The improvements you mentioned in your post are simply non existant. The current government enjoyed the world's most economicaly prosperous five years in a long time. Now that the party is over, what does the government has to show, what improvements?.... Simply none, the debt is just as high as it was back in 2001 and poverty is even higher at 35% and stuck there. Instead we have corruption galore, crime running rampant, the worst foreing politicys we have ever had with terrible relations with most countries (even with Uruguay, only this government could manage that), and a level of hatred among argentinians that i only used to read in history books.
And im sorry to burst your bubble, Nacha Guevara (her real name is Clotilde Acosta by the way) is just an oportunist, she too enjoyed good relations with the governmet in the 90s that granted her a place in the state's TV channel. Her comitment is just as big as the profit or position she can get for it.
As far as the IMF, it's far from being a perfect institution, but it has being extremely demonized here, as argentinians are fond to do so often, so we don't get to take responsability for our own actions. The truth is the IMF provides the cheapes loans avaliable in the market. In return it ask for a minimum control and transparent numbers, both things whch the current government refuses to provide. Instead it chose to take loans from Hugo Chavez at a interest rate of 15%. Im no economist either, but i'll take the IMF anytime.
Anyway, sory for the rant....
