NLP was a bit pretentious - by putting the term "neuro" in its name - but we could have lived with that. It is true that humans are programmable animals - and that they can be programmed using language. This is fairly obviously a topic for scientific study.
It seems a bit unfortunate that NLP didn't make more headway. If NLP fades away there will be a bit of a void in the niche it once occupied. I think we should probably hang on to the "linguistic programming" part. I can't think of any more appropriate terminology. We do have the well-established term "suggestion" - but "linguistic programming" is specifically to do with language, and not all "linguistic programming" comes in the form of suggestions.
The problem I see with "linguistic programming" is that you can program both brains and computers with language - but these are pretty different topics, so there is not all that much need for an umbrella term.
The most obvious alternative to this path that I see is to try and hang on to NLP - and turn it into a respectable topic. I'm sure that that path will have some advocates. I'm not sure at this stage that this plan would be effective.