SWTOR lacked a very compelling end game which led to boredom for a majority of people. PVP was bugged and PVE sucked. Its similar to what we have in Guild Wars 2 currently. Lack of end game. I cannot see it happening and I am pretty sure it will not happen in TES only cause these guys are experience and have a record of delivering content that players can spend hours on end engaged in.
There are players that have literally spent 300+ hours in Skyrim and Morrowind and have still not experienced everything the game has to offer excluding the DLCs.
You are contradicting yourself now in those last few lines. This is exactly what ZOS are doing. They are offering different story lines and levelling paths for those that want to experience the other side and only if they want to. They ain't forced. So you are warm to the idea of something similar. And you just confirmed it.
P.S Now tell me what you said and what they are doing isn't the same thing are you just intent on having one sided arguments?