@Hans-van-de-Ven-MR-MRA !
I'm not saying it doesn't work, but it just seems very strange to need these workarounds when previously technology has worked fine.

The top route is a gpx file showing a route made in Basecamp. As you can see it has the waypoints already set up as per the gpx file created. This can be imported directly into the CRN.

This shows the same route created in MRA and exported as GPX 1.1
As you can see the CRA shows them as support points and as you have explained, the route has to be converted to waypoints in the app, you then have to export this to the CRN (because you don't have the option to convert in the CRN. )
Other points to note are that, unlike our previous NAV5, there isn't the option to "fix" your route. Therefore, if you're like us and ride to planned routes (either from mags or ones we've created) we have to add more waypoints than previously added because it doesn't recognise shaping points and is more likely to take you off your route. We have to add them in after junctions so that it sticks to the route as much as possible, but then if needed we can skip them due to traffic/road closure etc. Therefore, the 50 max waypoints doesn't help and we have to break up our tours into smaller chunks. I understand this isn't an MRA issue and hopefully the CRN will provide further updates from everyone's feedback as it's still relatively new.
As I say it's not impossible, but for us, using Basecamp and the NAV5 was straight forward to plan, export and ride our routes compared to MRA/CRA/CRN set up.