"Destiny" is a hard hitting dance song filled with strings and dubstep wobbles, the chorus consists of insanely catchy "woooh woooh". Dubstep wobbles are not really new and can often just feel like a bit of a gimmick but I think they actually work really well here, it's really catchy and powerful.
One thing that Infinite's management learnt early on is how to distribute the parts to members, the know which members have better voices, you never feel that any member has been left out but also that the members with less vocal talent have too many lines. Dongwoo and Hoya deliver excellent rap verses as always.
In terms of the MV this comeback is a 180 degree change in image for Infinite (when is that not the case in kpop). Man in Love was all about being in love and a cutey image was potrayed with bright colours and aegyo smiles everywhere but this is all about fighting for the girl that's leaving you. The dancing is good. In terms of synchrony and cleanliness Infinite are the best dancers in kpop.
I think this is also the first Infinite single not produced by Sweetune which makes for an interesting change. There are definitely some influences from them though and Infinite still keep their signature sound while changing it up a bit. The Sweetune 80s sound that was sounding a bit stale has been ditched for something much more modern which is definitely a good thing.