I haven't seen the new colours in real life but it's worth bearing in mind that the individual retail customer isn't the first thing which marketers think about. The reason Mulberry fell apart was because the orders from retailers collapsed; if the bags don't get into the shops in the first place then they are not going to sell.
Given Mulberry's share price has steadied it's likely that those store orders have gone in, which is what the money people care about. Customers asked to keep the classic bays, and Mulberry has done so; there comes a point where asking that things stay the same is the commercial road to disaster, as we have seen with BHS going into receivership. Time will tell, and I hope you get your black one in the sale
Let's hope the retailers continue ordering after what may be a flop this year with these designs. At my local concession they had the Coca designs, Clifton etc pushed to one side and the SA seemed rather apologetic about them.