I have to disagree with you about this
specific study. The research isn't focused on subjects who have quit cigarettes entirely by using ecigs. It is about why some people are dual users of tobacco cigarettes and ecigs, when they could just be using ecigs. It's a psychological study, not a "How To" guide.
You must keep in mind that we are not "average" ecig users. We do more research, try more products and unquestionably know vaping works. A lot of people don't - we've all met them. Having better gear, adjusting one's nic level, using NETs or WTAs, etc., are often the answers, but not always. I think the findings are informative and could be useful.
[The r]esults [in the abstract] indicated that
dual users’ use of cigarettes is influenced by particular activities (e.g., before/after eating), strong craving or need for stimulation (e.g., in response to stress), places/situations (e.g., when cigarette smokers are nearby; outdoors), use of other substances (alcohol, coffee), and unavailability of an e-cigarette when needed.
How many times have you read posts from people who say they can't seem to let go of a cigarette with their morning coffee or when they are very stressed? One of the points the study makes is,
"For habitual cigarette smokers wanting to quit tobacco smoking, switching over completely to e-cigarettes may require skills of cognitive-behavioral management."
I've said the same thing to members (albeit, not so articulately), suggesting they try drinking their morning coffee in different room, use a new cup, take a walk first, etc., anything to change the trigger to have a cigarette. The survey of users reporting in what situations they prefer a tobacco cigarette to an ecig makes sense to me.
The article is long. Conclusions and results are noted in the abstract and in more detail at the end.
Contexts of cigarette and e-cigarette use among dual users: a qualitative study - BMC Public Health 2015
ETA: The study was funded by an FDA grant, but that doesn't mean it supports the FDA agenda. Nowhere in the study does it say ecigs are bad for you.