I'm sorry, but no. It doesn't make the tuning any more accessible when the current system works exactly the same as the Auto Tune setting did all the way back to the original game. You could always tune stuff the way GT5 does. The only difference was that you weren't forced to do so if you did want to do more advanced stuff.
Yes it does. I now have one setting that I change and that's it. Previously I could change that one setting but there were 5 or 6 other settings in there that I would also play around with and just mess things up.
So yes having just one button to press on a screen is more accessible to us noobs than having 7 and hoping that we only play with the last one.
I'm not disagreeing that if you want to tune individual gears then removing that feature is a very big deal.
But for me personally I feel the tunning is more accessible to me in GT5 than it was in previous games.