Let's see... This gets more nitpicky as the list goes on, but I think all are valid concerns.
- They significantly scaled back the PS+ edition at the last minute from what was earlier implied, from complete-ish game to large demo.
- Botched netcode to the extent that the PS+ version is still not released to avoid putting stress on the servers.
- Completely broken online at launch for paying customers, that has only recently become sort of reliable.
- Failure to meet 60 fps target hinted at by team earlier.
Driveclub is weird in the sense that the customers it has primarily let down haven't actually bought the game, although they
have paid for it in the form of the PS+ subscription, and as such, I think, have a right to be disappointed.