If you didn't know already, the third verse on No Apologies was written in a different era compared to the first and second.
I read over the third verse lyrics again as I know it was written in (possibly) late 2006, and it's not actually that bad. Given the era it was written in, when he was reaching the peak of his drug addiction, it was actually better than most of Encore and possibly all of his Re-Up verses.
Don't get me wrong the third verse is nothing compared the the first two, but he still has some half-decent rhyming on there.
Refresh your memory about No Apologies:
http://www.youtube.com/watch?v=ImlcPnzLAuc
First few bars isn't that bad at all:
This song isn't for you, it's for me, a true MC
It's what it do just to see if he still has it
And if his skills mastered,
He's able to spill raps long after his killed, that's a real MC
Got you feelin' me, whether willing or unwillingly
You still agree, as long as there's still this hunger and will in me
Even though the rhyming there isn't as impressive as the first two, it's still pretty good.
I don't personally think the third verse takes too much away from the song. It's a classic regardless.