I dont live in America so i dont have much experience in the racism debate. I mean, i dont know what is considered racist or not there. Apparently they can call themselves by the N word but if you use it with your friends in a non offensive way like they do, they get offended. For a foreigner like me it seems to me that they are the racists when everybody else just moved on. In any case what i mean is that in this subject i dont have the experience of someone who lives in america and understands how it works. So i couldnt tell if the twins were offensive or not, i just saw them as two stupid robots and nothing more. But if black people consider the twins racist they ought to tone their characteristics down for the next film.
I suppose that due to continuity they will be back, the question is for how much screentime. I wouldnt mind seeing them again but i do hope i see less of them and more of Sideswipe, Ironhide, etc.