The main problem I have with nudge is that 1. There is no risk involved for the nudger as this is so quick it doesn't leave you open at all and 2. there is no counter.
Let's look at the kick: very powerful but hard move. Leaves you open AND immobile for like 2 secs. Also if I know a player will try to kick me I can dodge it by circling around him or by stopping before his foot is in range. It's all about timing!!!
Nudge: no right timing, you can do it while moving, no counter, no backfire if you miss. It might be hard to connect but it doesn't matter because you can try it every 3 seconds without any worries and there is no reason not to.
The only thing you can do against the nudge is S keying to stay away from 1 handers, but even that is risky since you'll get knockdown if they catch you!