I dunno, I like the elegant simplicity of MOM:
- Engineer to build roads
- As cities connected to the road networks, trade bonuses applied, as long as each city was connected directly via the road network (i.e. a road would have to go around a city hub to allow bonuses to other cities)
- Did not need to micro individual caravans, etc.
- Had direct control over the road layout via the engineers (need to micro the engineers but that's ok, was used to it from Civ series)
Player was incentivized to build roads for 1. logistical troop movement 2. gold bonuses. Part of the reason why I loved playing Dwarves on Myrran, enchanted roads kicked ass.
The caravan mechanic in WOM meant player did not need to micro engineers to build the roads but had to micro the caravans, especially if in danger. If trade routes were always protected, meh, very little micro involved other than making one and sending it on its way. But split empires with dangerous lands inbetween, could be aggravating.
In the end, something has to be micro'd whether a unit to build a road or a caravan to make a route (and automatically create the road). I would prefer an engineer type unit which gives me direct control over the road route. It would be aesthetically pleasing if the road upgraded over time (based on age of road tile) and I could see trade type units traveling around, similar to the little people in the city tiles doing work, etc. A yellow brick road epic upgrade, complete with scarewcrow, tinman, and cowardly lion would be awesome.