At some level, I do think that voting for change is acceptable, although that shouldn't consistently be your practice. The desire for change that has largely carried Obama and Trump over the past few elections stems from a belief that the government simply is no longer working, at least at a federal level, and a change that at least makes it work is better than leaving things in the broken state that they are. Obama's and Trump's supporters have both fed off the sense that they have largely been ignored by the opposing party, and they would rather have just about anything but that.
If you truly feel that your government is broken with the current state of affairs, then I think it's completely acceptable to vote for change. This isn't to say that voting Trump was or wasn't a good idea, but I think the notion of dismissing a "change" vote outright is a little naive.
