To be fair though it does look slightly outdated now and the 'retro' badge has more of a modern minimalist feel to it.
Exactly my sentiments. I would much prefer this retro badge to be kept indefinitely, on whatever kit they come up with. If you look at the logos and brand marques that have survived the test of time they're always the simple, clean, minimalist ones. Think Nike, IBM, Ford, Coca-Cola, Apple. None of these companies have had to do much to keep their logos modern and fresh looking.
The existing CCFC crest is convoluted, fussy and drab. The typeface looks decidedly 70s kitsch, the geometry of the football looks odd (straight lines on a sphere?) and the colours are a messy mix. Something which works well in monotone would not only look more modern, it'd actually lend itself well to being used more tastefully all over the place. I'd never buy club crest-branded merchandise with the existing logo, but I could see that changing with the new retro one.