I think people understand it plenty, they just don't like it. You know, opinions
A lot of people like the fact that when people see them coming up behind them, they don't think "that's a Ford", they think "that's a Mustang". Until it's close, aside from the running horse emblem, there's not much to what we've seen other than "that's a Ford". Maybe the finished product will look a lot more distinct, but currently it does not. The fusion superimposed over the mustang makes this pretty clear.