What do you expect of police if it's provoked with rocks and Molotov cocktails?
FWIW, rocks appeared long after the sweeping attack by the police. By the time people started throwing rocks, many protesters had already been injured. Molotov cocktails appeared very briefly after many such attacks by the police for a week, and the police's reaction to these appeared less severe than their initial offense (back when they were attacking sleeping tent dwellers).
The best thing for Turkey would be overthrow of the current government and a return to something secular...
Turkey is still pretty much secular, so you'd need a precautionary reaction against a potential threat to secularism. These already happened many times in Turkey, and resulted in this situation.
Precautionary rhetoric in general, regardless of the subject, is prone to turning into religion itself.
I don't know what will be decided. Apparently the leftist groups are willing to stop the occupation while the greenpeace groups want to continue. To me, it sould continue until the police that has killed people be properly punished.
I think it should continue until things start moving about legislative, even constitutional change. Don't think it will happen though, since it requires a political consensus. If the Turkish left could do that, AKP wouldn't be in power in the first place.
This was never about the trees, so I hope the protesters don't try to build on that topic this late in the game. It has been a victory so far, but now they need to let the government build what it wants to build.