No new arguments I see, shame. But I'll get my popcorn... 
Why would there be new arguments when the same problems persist and are getting worse?
Instead of stating in the threat title "why arent we number two" how about celebrating what accomplishments that NXT has done?
I like some of the improvements in POS security NxT has implemented with slowly migrating to a TaPoS mechanism. Ethereum has some neat ideas as well that look more promising than NxT. Really cool when we can start to roll some of these into a BTC wallet or protocol itself.