I exported some relative stats, I don't think many track GF/GA relatively.I would do relative to get a better picture. Those were his first NHL games against a team that had two holey goalies to start the season.
You can take a few things from this for sure.
Clarke was average Corsi-wise, while his Fenwick was fantastic. That gap indicates he was one of the best on the offensive side of possession and shots that got through were dangerous, but he has some shot-suppression work he has to do. These don't take into account matchup strength, and Clarke was getting easier deployments than say, Anderson. I would say that's a fair assessment of Clarke, we all know he has a good amount of growing to do in his own zone. His higher risk style of play also needs some tuning and dialing back.
He was probably the best at creation, the team had a high shooting % when he was on the ice which indicates high-quality chances. That's something we've definitely noticed from the start with him, he makes things happen in the O zone.
The most glaring thing is the SV% when he was on the ice. Everyone is clustered around 90 except for Clarke and Gavrikov. Gavrikov had the benefit of Korpi, who was much better than the previous goalies. Durzi, Edler, and Walker were a bit lower as you would expect from giving up better chances. But when the SV% is that much of an outlier, it tells you your goalies were absolute dogshit, which matches what we saw at the beginning of last year. Korpi led to around a 5% increase over Copley alone - a pretty big gap. Well, the gap of terribleness from Quick and Peterson was twice as big. It's one of those rare instances where someone says "My mom could stop shots better" and they would be correct, provided their mom was 6 foot plus and flexible.