Roads without traveling along them are... quaint. There's some mild convenience in using them, but it's offset by lulling you to potential animal attacks at the very least. Further, many people have complained there's no real incentive to actually pave under them, which would seem appropriate. No matter what happens to the travel weariness situation, I still feel these changes are appropriate. It might actually help alleviate some of the issues caused by travel weariness modifications since it would make roads significantly more usable without quick teleports.
Issue #1: Lack of protection compared to travelling.
Currently when following a road you are open to pve and pvp attacks. Since we're taking the time to actually walk the road, the same protections that a traveller receives should be applied to someone walking the road. Animals will not aggro, players cannot attack you. However, if you are waylayed by hitting any object on the path, you lose these protections and get kicked out of following the road. This gives protection against animals, and at least some degree of protection against pvp although someone could easily drop a log in front of you to knock you out of the path if they see you coming.
Issue #2: Speed
Walking a road provides zero benefits compared to just heading out yourself. In fact, since roads usually zig zag a bit to get around obstacles sometimes it's faster to travel manually. To alleviate this, roads should give infinite stamina while following them. This provides dual incentives. First, it becomes faster to follow it than heading out on foot because stamina always limits manual travel speed. Second it actually gives paving the road a benefit, since unlocking higher speeds in forest terrain is now beneficial. I wouldn't want to say "this benefit only applies to roads that are paved" namely because it would make this benefit far too difficult to actually acquire, and many would go back to ignoring the follow aspect of roads. I don't expect most roads to be paved, but at least some would find it useful.
Issue caused by these changes: Unintended horse buff
Horses become a bit OP with the above listed changes, especially in the situation of unpaved roads being slapped everywhere. I would potentially suggest a nerf to horses making it so that they are limited to the same travel speed options that hearthlings are. Sprinting would be disabled in forest terrain to encourage paving and limit the travel speed of horses somewhat. I would actually suggest nerfing horses to only being able to sprint on pavement to further incentivize paving and using roads, however I will 100% admit I'm not sure if this has adverse effects elsewhere in the game that are tolerable (pvp? hunting? etc).