That is the difference between stating an opinion and fact. The fact is that the difference is subjective, his opinion is obviously that Skript is not a very good language. Either way sponge is purely for the purpose of enabling developers to interact with the server itself, this server is coded in java. Lets face it, putting in a good scripting system into sponge will most definitely bloat it to some extent, it will also put the responsibility of updating this function upon the Sponge dev team, taking time away from other things. I really donāt care if one of the developers has āsuggestedā that this feature might eventually be implemented I will stand by my opinion that a scripting language is non-essential for sponge and thus should not be included.
Also, what scripting languages will be implemented? There will only be one language implemented into the final implementation. There will be countless arguments and debates over whether a brand new system be developed for sponge (reference http://xkcd.com/927/) or whether an existing system will be implemented which will undoubtedly piss off one side of the scripting community just stirring up dissent. An open source ideal is many specialized parts working together to do one big thing. All in all I think it is our best bet to keep scripting outsourced to 3rd party developers, this will keep everyone happy.