Route Planning with Lezyne Devices

Hi there! First post on here and hoping for some sensible, cut-through-the-guff advice on planning my routes.

Got a Lezyne mini GPS which works well for my purposes and I like it.  New update makes it even more useful, however desktop route planning seems to be a bit of a faff.  Lezyne’s own route building tool will create a proper turn-by-turn route no problem, but if you want it to go somewhere specific it’s a case of sticking bunch of waypoints in which is quite fussy.  Basically it has no drag-to-alter like googlemaps or some of the other online tools. 

So first question:  What’s the best tool for sensibly dragging a route around, then having it spit out an actual TCX file with turns in it?  RideWithGPS seems to do this if you pay them for it.  Do other options exist? 

I’m actually happy with just the breadcrumb trail for a lot of rides (when I mostly know where I’m going) but would like to add a few of my own turn directions to a turnless GPX file.  This would be really useful as I could plan routes on the web, have GPS visualiser or whatever create a GPX file and then put in the turns I need.

So second question:  Is it possible to add my own turn cues to a GPX route?

I’m partly trying to mitigate being directed down canal paths here; this seems to be a perennial problem which hasn’t quite been solved yet.  I suspect the answers to these questions might be ‘pony up for RideWithGPS’ (might do) or ‘buy a Garmin’ (probably won’t). 

Curious to know what others are doing with route planning anyway.  Thanks for reading!