I think the point is that it's done and complaining/whatever isn't going to change it. It gets old seeing people go on and on about what they DON'T like when we could be focusing on what we DO like. I'm not saying that you've been whining or whatever, I just think that a lot of people (myself included) get tired of hearing it over and over again. You're entitled to not like it, but when it gets to the point that you feel the need to constantly go on about not liking it, it's taking it too far. Some people are pro-Twilicorn, some are anti-Twilicorn. It really shouldn't go beyond that. I don't have an opinion on it at all (other than feeling like the whole Twilicorn-transformation episode was too rushed) because so far all we know is that she has wings and is a princess. We don't know if she's going to the be same personality-wise, we don't know if she's going to remain an alicorn princess, we don't know if she's going to marry Braeburn, abduct Scootaloo and move to another planet to start creating pony-plant hybrids. We don't know anything. I hate to sound like all the people that you feel are attacking you or whatever, but just relax. It's just a show - everything will be okay.
Oh, and I'm by no means telling you that you should just shut up and accept it - it's totally okay to be against something. But also understand that whatever you say, someone will disagree with you. That's just life. Either way, I hope that when season 4 comes everybody's fears/concerns will be eased and we can just continue to enjoy the show. If not, well... that's life, I suppose.