Just a short thought.
Have you considered going Pejë/Pec (Kosovo), Plav (Monte), Shkodër (Alba) instead of going through Greece?
I never went through Greece so I cant say anything about that option. But the route I mentioned was really amazing in terms of nature. Do mind that the road was sometimes a little rough. Like no real road but just a lot of rocks. I just got my license before my trip and did it two-up. Sometimes my passenger walked a few yards. Road construction was going on so maybe now there is even less "offroad" available.
Also looks like you will be passing by Plitvička in Croatia. Its a little touristy, you pay for entrance etc. But although I dont like touristy stuff, it was very nice (again nature, but this is more spectacular post card-ish. The route I mentioned first is more wild.
Regarding Norway. I was there this summer and did a similar trip as youre planning. I see youre planning to take the "lots of boats" path from Stavanger and north. I got some advise to go there but I opted to go a little more inland and I really liked it. The difference is that you get not only fjords but also some of the mountains/highlands or whatever it might be called. Not sure what you prefer but might be worth checking out. Two examples of nice places are Hardangervidda National Park (I went through north part) and Jotunheimen.
One last thing. The road you picked for crossing Sweden... Maybe its because Im from here, but it is not special at all. Just road and trees. I dont have a better suggestion but just a heads-up
Good luck!
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