I know now apparently, that if it is a Flintlock book there will be steampunk in it. The problem I find, is the book is not promoted at all with mention of this fantasy element - and that is where it is losing readers. Many read Johnstones for the strict western element, if you're going to deviate, at least make it known. The second people start showing up with goggles I actually had to put the book down and force myself to keep reading. I even like the Barnabas element, I think it is interesting and spiritual enough to fit the genre. Just maybe, you know, advertise the book properly for what it is.
Otherwise, there are likable characters but the plot moves quick. Before you can adjust to the who, when and where it is changing and there's new people and a new threat. It could be fleshed out a little more, the threats could be brought to fruition, make us understand and see how and why the threat is possible.
Flintlock is a good character but he seems to keep making stupid decisions. When it is not blind luck saving him, it's O'Hara. I think we need to see Flintlock resolving the issues a little more ..resolutely? to really connect with the character.