Dual Travel Powers you'd like to see
Seconding or suggesting wrinkles to other ideas:
Phase Run : You phase out after running for a few seconds and can fly at high speeds, and phase in when you stop. Great out-doors, not so great inside, but seems fun.
Super Athletics : Slottable ninja run, basically, with ideally a double-jump (you can jump while in the air, kind of like the jump pack, but this ability is disabled after you use it until you touch down again).
Gliding : Ideally I'd combo this with climbing/ledge jumping, but as it stands, it would be a Super Jump ability with a lot of vertical and very little lateral speed on the ascent and a high lateral speed and low vertical speed on the descent.
Swing Line : Seems cool.
Tunneling : If you could go up walls with it. I don't care much about the graphical logic problems brought up.
Lunge : Teleports you directly next to your current target with a good range.

Goodbye may seem forever
Farewell is like the end
But in my heart's the memory
And there you'll always be
-- The Fox and the Hound
Was just coming here to suggest a solution to "Never Getting Growth or Shrinking" to suggest that I'd settle for a cosmetic application of both power concepts as vanity travel powers, especially if they included unique postures.
Perhaps, in the spirit of this thread, the size change could be controlled by one master toggle with subtoggles in the pop-up tray for various travel powers within your size shift.
As all the vanity travel powers don't permit combat, this would work around the massive amount of animations and other technical issues currently preventing any size change within the game. Also, it would then permit the animators to create appropriate postures and custom animations for Giant Sized Leaping and insect-like Diminutive Flight.
The reason for the subtoggles: what if you don't want your super tiny character to fly, but rather to hoof it or leap as well? Also, since a super tiny character walking or jogging would look like they have super speed worse than baby new year, the base speed for super small characters could be cut by 2/3rds, allowing you to look like you moved a little more normal and convincing if you super shrank and had no travel power toggled on.
Lastly, as vanity travel powers, it allows us the playerbase to broadly apply these concepts to our characters across all ATs.
So yeah, my dual to triple travel power request would be two different size change (Growth and Shrinking) as vanity travel powers.
Swing Line and Acrobatic Run
BrandX Future Staff Fighter
The BrandX Collection