I have taken up using MyRoute, with some success. Indeed, I now prefer its flexibility over BaseCamp and / or the now very old MapSource, both of which I liked a lot.
As with any software, it’s a bit quirky at first but it’s certainly a lot better than its earlier versions. The help pages, videos and forum are very good. With a bit of trial and error, I have created nine separate days, riding around half of France in an anti-clockwise direction and three or fours days out when we are there. By the time I’d finished I’d got the hang of it, made a little bit harder as I did most of it on my iPad.
PS When you come to sending the route(s) to your XT, the 1.2 version works fine. From my XT, I have then Bluetooth’d the route(s) across to a Nav V, where they are fine, too.
PPS It is definitely worth opting for the Gold version. I bought a lifetime subscription years ago, when it was peanuts, simply in case it ever improved or I really needed it. The now poor performance of BaseCamp on a Mac and the purchase of an XT, persuaded me the time was right to fire it up.
PPPS As with any routing software, it might not always chose to take the roads YOU want to ride down. Zoom in and reshape at will.