Why is Syria without Assad a good thing? President Assad is Syria. If he´d fall, Syria would fall and would be divided into the Islamic State of Syria and Iraq and what Al-Qaeda´s Al-Nusra would make of the areas it controls.
And if Obama needs to sell his own Grandmother to show Putin that he is on eye height with him, he failed to show it dramatically as well...
Furthermore it is up to the international community to help the Syrians to get rid of these terrorists.
And have you heard about the 7 year limit Syrian Presidents are facing as of the presidential elections 2014? Isn´t it what the rebels claimed for? Why are they still fighting?
Constitution of the Syrian Arab Republic, Article 88:
"The President of the Republic is elected for 7 years as of the end of the term of the existing President. The President can be elected for only one more successive term."
Constitution of the Syrian Arab Republic - 2012