I'd just add a little more sugar... from memory, my go to is about 2% salt 1.5% sugar, but sometimes I think I end up closer to 1.8% of each. I have never really cured more then the minimum , or about 5 to 10 days.
I've been lead to believe that sugar, and most anything besides salt and maybe the Nitrite, ever gets deep into the bacon. That is, stuff I've read says that spices and sugar, really don't go much beyond the very surface of the meat...
I do think additional sugar can make it less salty, but then I don't know that there's any good reason to not just reduce salt. As far as I know, when we are making bacon like this , we aren't really doing it to preserve the meat, just trying to make it safe to cook/eat. Since, it's refrigerated during the entire time it's cured, and you've got Nitrites, there's very little chance of anything nasty growing on it, so no good reason to heavily salt it.
Now, if you were planning on true cold smoke, maybe some further need for salt, but I've read that for salt to actually do anything to prevent growth of nasty stuff, it's got to be added in concentrations way more of it then most of us would want to eat. So, even when I've done true cold smoking, I've never went much above 2%.