I was using my now second GK for 4 seasons including this one. He was always very solid with good ratings.
But after a string of unexplained bad performances (even my AM reported that he wasn't motivated enough for some reason) I promoted my second GK to starting XI.
I've got to say that I haven't even remotely regretted it. He's constantly putting 8 rated performances and living up to the task in general.
He had a little bit less quality at the start of the season but he's a fast trainer and already better in GK qualities than my other one.