To aid in races that use teleport but want to stay on the ground so there is no falling I would suggest the ability to detect the floor and automatically teleport them there. The needed code can be found here: http://forums.alliedmods.net/showthread.php?t=89256

In addition it would be nice if there was a way to make it so the respawn detects if your going to be spawned into a space that is too small (like a vent) and will then automatically spawn you in spawn instead. This could be accomplished by modifying the code above to determine if there is enough space for the player before spawning them there.