I really don't think they care what you like or don't like. It's their company; they can do what they want. You should be glad there are even people like this out there who keep producing custom content. You don't have to download it when it comes out if you don't like it.
The RPG may have the ability to fire without aiming-down-sight, which would be a huge improvement. Plus, the RPG could be like the AMR: limited ammo, but huge damage (more so than the LAW). You don't really know anything about the weapon specs other than the fact that it launches rockets. There are a plethora of rocket launchers that have many different functions. Maybe there will be a lock-on feature for big Zeds, or maybe you will be able to guide it remotely: there are many ways it could be different than the LAW; wait until it comes out to pass judgment.
Well hey, at least you'll be able to be more pro with more guns
Again, they can do what they like. They don't owe us anything and we should just be glad new stuff keeps coming out, regardless of what it is. It's not their job to fill gaps in the KF weapon selection, it's just to add some more fun content. I'm just glad they keep doing this kind of work.
Too many users complain about free content: it's FREE for the love of God. Don't be spoiled brats and complain about getting stuff for free; it's not like you have to pay for it; it's just there if you want it. If you don't want it, don't download it (but I have a feeling you will regardless). How about they just stop doing it? Would you be happier then? Put your complaints in your back pocket and just be glad there are people out there who care enough about the game to keep making new things to keep gameplay fresh. Hell, I'd be glad if all we ever got from these guys were re-skins of the same old weapons, let alone entirely new functionalities.
Keep doing what you do Jack and Ivan; the KFC owes you one.