As of right now, speed shoes are worthless to everybody except Tails and Knuckles, and nobody in their right mind does a speedrun with Tails or Knuckles. (Well, in most situations)
Therefore, I suggest the following to make them more helpful to speedrunners.
-While it currently just increases the top speed of the player, I say it should increase the top speed done by running - meaning that you will retain speed if you achieve higher than your top speed through means such as a speed pad.
-Actionspeed is increased for all abilities.
-Using your ability will add to your momentum, not reset it. (i.e., if thok speed was x and your speed in the air was y, then when you thok, you will go at x+y speed, not x)
-You no longer need to charge spindashes - you will automatically start at max speed. In addition, max speed is increased.
In layman's terms: abilities are faster, you will not slow down unless you actually want/try to slow down (or hit a wall), abilities add to speed, not reset it, and you don't need to charge spindashes.