Zel, HG is definitely not a remake of HG, right? Therefore i think that both are different games, except set in the same 2 regions. Honestly said, I've grown a "nostalgia" feeling to your ShinyGold now. SG is totally different from HG. I do admit that HG is amazing, and although it may have more than SG, it still doesn't have what SG is offering. The 2 gives us different feelings of "fun".
I forgot when, but the first release of SG was already quite sometime ago. Throughout the years of waiting for new releases and excitements, i have almost forgotten that SG is a remake of Gold, and instead a feeling grew in my mind which told me that "ShinyGold is another official game in advance gen". I've even missed it now, as if it is another old game in need of a remake. A great game definitely deserving for a remake. So, my point is, please don't give up and possibly continue the work and release a SG remake, "the next beta". I think this worth it more than throwing all your hard work until today.
We won't rush you anymore, please take your time, as long as you come back and possibly resume SG. Also, when you come back, can i be your friend? You may not read this, i know, but i can't help already but to tell you what i think... Low chance that you may read this, but it doesn't mean no chance. Forgive my long post.