I get what you're saying. But I'm the last guy that you're going to find save pct. mattering for...the point is, those players may have been good in that moment, but the point is, they generally weren't good not in those moments...it's weird that all three of them had noteworthy playoffs (Giguere has 2003 as well, of course) with Pronger managing things for them...and then didn't do diddly-poo for all or nearly all of the rest of their careers...
Save percentage, GAA - flawed stats for sure. But based on available data they're what I have, and even if they aren't themselves convincing, it's rare you'll find players with *good* GAA/save percentage that were outright bad.
And - to your point that they only had noteworthy playoffs with Pronger - I just don't think that's true. JSG was clearly considered - if not outright elite - then at least very good based on his Vezina voting record, already had a Smythe (which involved one of the most impressive playoff series' of all time by a goaltender against the Red Wings), a handful of years prior. With him, we only have 4 data points for his playoff performance, and two of those runs were Smythe-worthy. I don't see how you can give all of the credit to Pronger with a straight face (especially considering how insanely deep that Ducks team was).
Roloson had 2011 with the Lightning, where he was behind a D of Ohlund, Eric Brewer, a baby-giraffe Victor Hedman, Brett Clarke, Ryan Jones(!), and Marc-Andre Bergeron (which I'm sure gave Roloson some flashbacks). There's not a Pronger-level player in the bunch (Hedman is now, but wasn't then).
Neither of these guys had a lot of opportunity to show it in the playoffs, but both had 4 runs, and both had 2 runs that were great (with one of those sans-Pronger).
All of this is to say that I understand why Pronger gets some bonus points for his post-lockout playoffs. I think it's a bit exaggerated, but fine (same with his Hart, frankly). But it becomes the thing where the *legend* of these runs outstrips the reality to a huge degree, and hearing stuff like "Pronger shows that Lids wasn't *really* that great" from BeachBrawl in what should be a discussion based on facts rather than hype really f***ing bothers me. I knock Lidstrom a bit from where you would expect based on his Norris record because I think his quality of competition was *very* low (not another top-50 player in competition for his Norris wins outside of his first which was a last season Bourque), but at the same time he was head and shoulders the best D of that era, and he deserves respect for that.