The Argy is probably one of the best re-balances to date. I used to use them all the time early-game to fly to mountain tops and carry back resources, so I love how instead of making it more difficult to do that, they actually incentivized it. Overall, these are great changes to make Argys not completely obsolete to gryphons & wyverns IMO.
I've heard some argue that ruins the game because it takes away exploration, but I disagree. There's nothing stopping anyone from doing the same with non-fliers, since now many of the land dinos are getting reworked as well.