It IS a travel power. Period. Full stop. That is how it is classified in the game by the volunteers how created the power.
Infiltration via COD
Since the quote above is your opinion, you're empowered to say it is not a travel power, in fact more power to you, all good - you could even call it a duck or a car tire... but for everyone else who doesn't live in your fantasy world, Infiltration is a travel power in this game. It's movement bonus (running and leaping speeds) can be enhanced, just like the other travel powers. It also provides the added benefit of concealment (so your point about a travel power not working with other stealth powers is odd), and can accept defensive set IOs. These are not my opinions, this is reality. Go try it out, it works well for players who enjoy using it on ninja-themed characters or for players who want another LoTG mule power.