I never argue with a bus... und usually on loo out for people around them. But ja - see what you mean und ja - would agree that the wording regarding the roundabout need a little more precision.
They did try with some cycling ones und the existing ones would be the worst rules as far as some are concerned - assuming they have read them anyway
But .. tja... which would be the one I would fasten on
Ach! 177.
NOT the bit about reversing from side street into main road. That STAYS! That bit ist sense.
But the rest ist superfluous.
second sentence in Rule 177 wrote:
When using a driveway reverse in und drive out if you can
I think it depend on type of driveway und type of road und conditions. For example - if your driveway has very, very perpendicular gradient (und some do) - und narrow gate posts - und some do - then driver could end up holding up a lot of traffic on main road trying to manoeuvre his way into this. Und then he still has to contend with the passer-by who will not stop for a bit of courtesy (or bit of free entertainment dependent on point of view

) und there are also the pavement cyclists of course..
To me - irrrelevant und surely best to person to decide which suit him or her best.
Should really read - when entering any main or side road when setting off from your driveway - blinking well take a darned good look around you und take care to see other road users - und manoeuvre with care.