In my fantasy world, of Honda came to me in a vision and said "We're making the ST again... What do you want..." It would be DCT a sixth gear and GoldWing horns. But in the real world it's good enough for me as is.
I'd probably go for a modern dash with better LED lighting that you can actually read in the sunlight, and a gear indicator. Maybe cruise control too, but I'd probably never use it. Bright running lights or fog lights too would be cool, but that's an aftermarket item on my bucket list.