You are absolutely right mate. The game is fantastic, but it will slowly loose its charm down the line very soon because people find very hard to play multiplayer events/races. Single player missions are fairly easy and I believe many of them would have already got their shiny platinum by now. All drive worked somewhat well with Rivals because it didn't have narrative story line (at least not like the current one) and single player missions were all just some objectives.
Multiplayer lobbies would provide some longevity to this game and bring all online players who would like to participate in a race/events quicker rather them roaming around the city for hours to race with someone or join a crew that hardly have 3 to 5 people. I'm pretty sure majority of the people especially the long time series fans want this to happen. WE NEED LOBBIES!!!