Players who use chars with strings that have long range or lots of forward movement will probably naturally develop good footsies. Example: JC, Raiden, Mileena. SZ's ice clone is also great for footsies.
Now that I think about it, pretty much every character in the game has a tool that helps with footsies. Not developing a good footsie game probably means that your character's tools have a hard time being utilized online.
Now that I think about it, pretty much every character in the game has a tool that helps with footsies. Not developing a good footsie game probably means that your character's tools have a hard time being utilized online.