I wouldn't say that I'm bored, but I could be having a better time. I'd really love to take advantage of online, but the physics difference (among other online peculiarities) is problematic and I would have to commit to only playing online in order to enjoy it; back and forth is more frustration than I'd like to deal with, especially when tuning comes into play.
I really hope this gets remedied with an update, but that is highly doubtful. Not knowing the exact cause, I can not even be sure that GT6 will be any different.
That said, I do have a good time in offline mode, where I like to concentrate on driving various underused cars as hard as I can, i.e. my focus is on enjoyment and challenging myself. Photomode is another, but I like photography, so...
For me, it is still a workaround.