He does not need a teleport for a far range freeze for a number of raisins.
His freeze sucks. Slow start up means unlikely to ever work outside of combos.
His dash will get him there.
Teleport=useless.
Just because his freeze isn't as good as sub's doesn't mean its a death sentence to use it, you can still throw it out once in a while and when it does happen to hit far range you have to use his teleport.
I mean freeze will still catch jumpers and you'll usually have to use teleport to get anything substantial from an air freeze won't you? Even ice beam I don't think they're frozen long enough in the air for you to just easily dash up from distance.
His teleport obviously isn't useless. Not a CSZ player myself but I'm sure you can still use it when you read a special with enough recovery where its safe and can get you in. I'm not sure how well it'd work but I guess it could be used as a wakeup against a projectile follow up at far range and when someone jumps at range too.
Even if it was 100% useless as you make it out to be, its still ok for a character to have a useless special, especially one as good as CSZ.