On MRA you can plan a route in a similar manner to how it is done in Basecamp with the segment tool.
Instead of using the segment tool, in MRA you place the first waypoint (flag) and the place all the subsequent ones till the end of said route. MRA will mark the waypoints in the middle as shaping points.
You can do start/end and drag, but can lead to confusion imho.
Apart from that, I agree, i find the file management in MRA fairly convoluted (reminiscent of early 2000s web software), you can only manage one route per file (I know you can reference other files but it's a faff) and I still greatly prefer using BC (it's faster).
In my experience, and considering the way I am used to plan routes and/or tracks, I operate faster with BC.
But I find MRA very useful when doing the initial planning as i can overlay viaMichelin layers.
I keep using both for now.
Sadly, I think the only alternative to BC Garmin is working on is Explore and that has already proven to be sub-par.
There is, apparently, a big MRA overhaul underway. We'll see.