I remember seeing somewhere that SCS is planning on having a graphics overhaul to the game in the near future, which would be very nice to see. I do think some players, with better computers, may have experienced better graphics in other games and to see an overhaul from the standard graphics would be appreciated from those people.. However, if this was implemented into the TruckersMP servers, it would be nice to have it optional, especially for the players who travel around the Calais - Duisburg area and are laggy.
In my opinion, I think the positives of the addition of a graphic mod, such as Project NextGen Graphics mod, would outweigh the negatives - it's a yes from me!