We recognize that it's Blitz when we see during the loading screen that the skin says "Lancer Rouge/Ranger Blitzcrank", this gives us all the info we need
We recognize that it's Blitz when he throws out his hook once and it clicks that "hey, this is Blitzcrank"
Is the silhouette a bit different? Sure. But it's not _that_ different
Keeping the base run animation on these skins diminishes the quality
You don't have to keep a running animation that doesn't fit a skin and looks funky simply because you think players aren't going to recognize who it is, you _really_ have to give us more credit than that, we can most certainly put two and two together and figure out what's going on