Whilst i personally dont think theres anything wrong with the current livery and branding, I have heard we're expected to know more about a brand refresh around June this year. I think the current livery and branding is just as relevant now as it first was. Its one of those thats managed to remain pretty timeless over the years.
The opposite can be said for the interiors of course. Tired and tatty is being polite, but when you do manage to get on a service where you can get a seat, the trains are actually comfortable. A sentiment the majority on here i know agrees with too.
Lets just hope that concept interior image we were teased with, is completely wrong and that colour pallette is never seen again...