Looking for feedback on route in Balkans in April

I'm planning a bicycle tour in across the Balkans (Serbia, Kosovo, Montenegro, Bosnia / Herzegovina), starting in Belgrade in April. Can you take a look at my envisioned route and share your thoughts?

https://www.komoot.com/tour/2038490433?share_token=a2yTxvAX8y7e8cd42vYBOI5E82xufnCOAdskKu4uJcyQiMfE9Q&ref=wtd