In hindsight the smart move would have been to trade Stone the summer before but I doubt this market would have reacted well. Dorion just put off the inevitable crucifiction for 8 months.
No market reacts well to trading a popular player, but if you get good value back they move on much quicker. Trading Hossa wasn't popular, but the return was. Fans still complain about the stone trade because the return has been underwhelming. People have moved quickly on from the Pageau trade because the return met expectations. People aren't complaining about the Duchene trade either, again, in part because the return, we got a 1st, plus a condition first on him re-signing, and a couple decent prospects that didn't pan out.
Fans mostly understand you have to trade players from time to time, that doesn't mean they are going to be happy about it but they move on quicker when the return is commensurate. Maybe expectations for a stone trade weren't realistic, but I don't think sens fans or this market is unique in having high expectations for trades involving players that can command 8-9.5 mil a year contracts