@Erdna
I also use "route as track" navigation a lot. The main reason is the lack of a "curviness" option with HERE, so I use TT or OSM for planning instead.
My routes have 3-5 VIAs and a handful of SPs, and I let the routing engine do its job.
As all these roads are typically routable with HERE as well, there's hardly any difference when it comes to navigating the route (as track). And if so, it's easily manageable - the same applies to some erratic behaviour that occurs from time to time (very rarely).
It may depend on the areas you're riding, but in my case, this works very well.
Have a great riding season as well!