imo (and i hope) this is only temporary, they should really push to release dedicated server asap, it will change everything (if they do it right). thats should be no1 priority atm. as long as it is not available, ppl will not consider this game as a real option for serious racing.
pCars is for kids and naiv ppl who still beleives in the miracles...pCars most probably will be a fun arcade game with the best graphich we ever seen in a racing title...but that's it.
AC is the another "illusionary" title, with shiny new graphic engine (the cars look really nice), and lots of "self polishing" promises and videos but somehow it is just not as it supposed to be. The AI is stupid like hell, the netcode is a crap, the sounds are just simply terribe (especially if you compare it to R3E), some of the cars feel real good, but some of em feels like i drive in NFS...
don't know a lot about RF2, i habe it, sometimes im having fun with AI (for me best AI atm), but do not have any mp experience, and the modding side is a chaos for me.
so i think R3E has the chance to be the no1 racing title for casual and semi-pro racing community, but they have to focus on ded servers to achieve that....