Gamespot has posted a feature article entitled "The History of Real-Time Strategy Games: Part 1 1989-1998". Including discussion about Dune II, the Warcraft and C&C series, Myth is mentioned in the final section "The Early Fruits of RTS Evolution". Here's a snip:
While RTS games were traditionally built on the idea of "harvest, build, destroy," Bungie released Myth (in 1997), which left out all the resource management and concentrated on simple unit tactics. It was a huge success, partially because of its gorgeous 3D graphics, but also because of how well it maintained the strategy and excitement of real-time combat in the absence of buildings or structures. The focus on unit tactics required some improvements to the standard interface of the time and the ability to manage formations (with unit placement being of the utmost importance). Myth also introduced some interesting multiplayer games, like Last Man on the Hill. With its outstanding graphics, smooth multiplayer, and tactical gameplay, Myth and its sequel, Myth II, carved out a niche in the real-time market for those more interested in combat than in resource gathering.
Overall, I'd have to say Gamespot is a fan of the Myth Series. They gave Myth:TFL a 8.9 rating (great) and Myth II:SB a 9.2 (superb). No mention however about the versatility of the game engine and the many different incarnations and 'mods' that have been developed, but I guess you can't have everything. If all goes well, Myth III:TWA will continue on in the original's tradition (we certainly hope so!).