If I don't use this option, does this mean I don't have full control over the token I create?

Even without a dedicated skey, you maintain full control over your token in terms of ownership and total supply management. The primary consideration is how you manage updates to your token's registry information:

• Without the skey: You will need to use our platform's form to generate and update the JSON metadata for the token registry.
• With the skey: You have the option to use our form or handle the metadata generation and updates independently, giving you more control and flexibility.