It is definitly required to have at least a message box for teh road to avoid acidently deteling. Today I deleted a road by a missclick. So 200 deben lost by a simple wrong click. This is very hard on start of the settlement
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I just did the same thing, trying to delete a couple buildings to put up totems for diplomacy points and I was must have missed. It is just too easy and no warning.
This road cost has me hoarding roads, where I'd normally put runestones, I put extra roads, so I'm selling MORE diplomacy buildings than before. Really the Viking diplomacy buildings are so slow in worth and 360 more are needed to completed to finish than Japan. But that's a side issue.
One possible change is to make some of the quest rewards cultural coins instead of supplies or coins or just another self aid if the daily allowance is so low and they aren't going to change the cost of roads.
I guess I am making more of a fuss than most because the rewards, especially the Ygg tree with the military boosts are indispensable. I don't plan on just not doing settlements, either here or in my real game. There I am focusing on Vikings before any changes are made since they are harder to do.