I don't think Jericho going back to WWE means anything for the perception of AEW. At all. It's not like a Kenny or even Mox leaving for WWE. I wouldn't even say it's as big perception thing as the Lucha Bros, possibly even Starks leaving, because...Jericho at some point was always going to go back to WWE for HOF and WM/Saudi pay day, and should have the last two contracts but was able to work TK into no doubt overpaying him to underdeliver and be an albatross on TV by floating he would be open to going back to WWE. I don't think it hurts AEW in any way at all to lose Jericho at this stage.