You should be able to punish regular and EX Teleport every time, that much is true.
The rest is not relevant and or viable. For starters, good Scorpion players will just block after the cancel, it isn't punishable iirc. Especially because if it is a frame perfect punish you are going to get hit by the teleport attacks, as you have to wait in order to punish in case of an Amplify. In the video the bot blocks and then you use the string. That isn't really a punish.
The issue is not teleport and Amplify teleport, the issue is that he can cancel it to be safe, can cancel it into a throw, and can cancel it into 2 which leaves him plus.
Scorpion is like Sub for me in that he's not in my "needs nerfs now" tier. I think the teleport is great and makes him top tier but I think he will be more manageable as people get more experience vs. his offense.