Slaminals are the main reason why some of the people I know outside of DA who are into your works Kyle. I say you should keep them. If you dont have them, your gonna lose a lot of interest for this then. I'm not saying this in the rude way. I like the Slaminals myself, but if your going to make a plan B for weapons Kyle. I suggest you put some thought into it.
The slaminals definitely give a lot of interest to Go-Rama with the many varied living weapons he'll be using. If he didn't have any of them I still think it could work if he still has cool weapons and if he's a well-thought of character to begin with. But I'm very glad you came up with the Slaminals. They're so awesome.
The way I see it, one could work and so could the other within their own stories. You are a very capable story teller as well as an artist so you can definetely find a way to incoporate both.
The way I see it, the slaminals remind me particularly of the pixls in Super Paper Mario each of which has their own backstory, and they aid mario in several unique ways (one can be used as a bomb, one can turn you even more paper thin etc). I think the Slaminals should have their own story and maybe their should be something that connects all of them in a way (though I'm sure you've probably thought of that aspect already). The slaminals you've come up with so far are very imaginative and you can very easily come up with tons of ideas for em.
That being said, Go-Rama is a very likable character in his own even without the Slaminals. I'd say in the end, trust your gut feeling with this but in my opinion, I feel both can work well together.