He was not fine last year... if you just look at the box score, you could be fooled into thinking that. He gave up a lot of soft goals in that series, and when it was as tight as it was, it was the difference. This isn't even hindsight, I was bitching about it then. He wasn't an utter trainwreck like this season, but he was giving up soft goals and in a series that went to 7 games where one or two of them make a huge difference... he's a major reason for the loss.
Annunen might be fine, but a big reason the Avs haven't gone to him is coaches are risk averse. The risk of moving to a rookie backup is just too much... where the risk of moving to Jake Allen, wouldn't be nearly as high.