I think a big problem is for anyone who has ridden a larger or more powerful bike for any length of time, is that the step down to these neutered learner bikes is, surprising to say the least.
Flat, emotionless, undramatic power delivery of their modest BHP, takes a bit of getting used to, and on first impressions for experienced riders is that they are incredibly boring and a bit rubbish.
The fact they are built for middle aged women, spotty oiks who have only just passed their test and people who are scared of their own shadows doesn't seem to register.
It's probably a very capable method of transport that's exiting as it needs to be for its target audience.