MANPAD attrition of regime helicopters continues + many destroyed on the ground.
Lots of government armour being destroyed by ATGMs. The rebels seem to have a plentiful supply of these.
On the government side there are lots of Iranians and Hezbollah who seem to be far more effective than Syrian troops.
Likewise the rebel fighting now seems to be mainly the Jihadist Al Nusra Front, who are largely foreigners. They are very effective firstly because many of them are experienced fighters from other conflicts such as Chechnya, Libya and Iraq. Secondly because their nutty religion says that their death caused by a war against fellow muslims is a very good thing. These salafists are attacking Syrian Christian civilians at random.
However bad things are now, they are going to get worse. Neither side thinks they can lose, or wants to negotiate. There is massive destruction in the country, infrastructure, buildings, military equipment and human lives. It is becoming a battlefield of rubble, like Beirut. The most effective weapons are man portable. Anything much bigger is vulnerable. Saudi, Qatar and now the USA are pouring man portable weapons into the country to keep the rebels effective. Most of these weapons end up with Al Nusra.
Israel is gearing up to act. Their air force have just finished a major exercise in Bulgaria against an integrated air defence. Israel have struck several times in Syria this year, mostly unreported. They don't want Syria to become an Iranian proxy on their doorstep.