What you are asking is in simple terms thesis topics for all their sociology students for the next 25 years for a half decent university.http://en.wikipedia.org/wiki/Rajanna
I would ask you to watch a brilliant telugu movie called rajanna. Shorn of the over histrionics and national integration sentiments, the super man hero - the film potrays the feudal era of the collaboration of the feudals with the ashrafs.
Also note that only telangana had a near continuous muslim rule, since 1200 - after the defeat of kakatiyas by tughlaq. There was a brief interim where the local elite came together and threw out the rule. But the divisions were ruthlessly exploited and the rule was reestablished.
The coast seperated by the eastern ghats was a football between local elite, orissan gajapatis, muslim kings of telangana and the vijayanagara empire. After the fall of the vijayanagara, it went into nearly 200 years of muslim rule from telangan but the local revolts were never pacified. This was the reason why the coast was one of the first areas which he gave to french, then the british.
The rayalseema which is on the south side of tungabhadra was under complete dominance and center of vijaynagara empire. After its fall, this area was in the center of remnants of vijaynagara empire, nizams from top, mysore from the west and sort of became badlands where proper rule couldnt be completely established - until the british took it. Note that there was a nawab of kadapa under the nizam. These badlands included madras where the british established their first foot hold by taking "permission" from a remnant vijaynagara king who was ruling from penukonda.
So the near control domination of a single caste was possible only in telangana because of the continuous rule. Thus though feudals existed in both rayalseema and coast, the level of feudalism which can be guaged by the address of the common man with "i am your slave, master" was found only in telangana.
To counter the power of telangana feudals, the communists and naxals dominated by coastal feudal elite. It was TDP, which is powered by coastal elite which removed the vestiges of hereditary systems in telangana. PV Narasimha Rao, from telangana tried it but failed because his laws effected the coastal elite as well.
You will note that the seperate telangana movements were always led by the feudals of telangana. The power of telangana feudals when they did not have ashraf backing was low compared to the coastal elite. This is because of the relative poverty of telangana compared to delta. So tdp which is dominated by delta elite, opposed seperation as it increased their bargaining power vis-a-vis center because of heft of telangana numbers.
Because of the same reason, TDP announced a backward caste chief minister for telangana but will never announce one for the seemandhra or while the state is united. and TRS which during the agitation announced a scheduled caste CM, when it needed the common telanganite support but after seperation backtracked.
There are wheels within wheels within wheels.
patel-patwari system and why brahmins are against tdp.http://en.wikipedia.org/wiki/Patwari#Patwari