Don't get too excited. Filing your taxes online in the UK is also still largely horrid, and often seems to require either starting afresh (the equivalent of "turn it on and off again") because some unknown error is reported on submission, or just phoning HMRC to talk to someone.
Whether this is because GDS haven't got their teeth into HMRC yet I don't know, but not everything over here is as shiny as some would have you believe.
Actually 'Making Tax Digital' means eventually the manual tax submission will go away. They're pushing all tax returns to be completed via API from accounting software.
Your taxes are probably more complex than mine, but to counter this with an anecdote: I've been using Self-Assessment Online for years and never had an issue with it.
Whether this is because GDS haven't got their teeth into HMRC yet I don't know, but not everything over here is as shiny as some would have you believe.