Re: I hope that HMRC...
The HMRC online estate is OK - meaning the current online SA and VAT returns, but the problem with MTD is HMRC are expressly *not* providing any means of a consumer interface - not even a reference implementation for software vendors/accountants to understand how it might be made to work in the real world. It's really just a set of APIs pushing data into HMRC. And for that reason, the transformation they are looking for from a paper world to a online digital world is miles away. They're 2 years in and haven't agreed on the user journeys.
You're still going to have to submit your VAT every 3 months, but now you're going to have to provide every line item to prove the numbers.
Same goes for self-employed / sole traders - record every item of income and expenditure into some "digital" form, and submit the summarised details every 3 months via the API - no website! - AND THEN at the end of the year submit it all again AND THEN swear on your firstborns soul that you've made no mistakes. Apparently somebody somewhere will provide this service for free - because that's HMRC policy, and so it shall happen.
The burden is massive and disproportionately affects the by-the-rules small fry, and goes nowhere to catch the rogues.