It would go a long way if you can cite what you are seeing that gives you the impression that you are correct instead of screaming into the void.
Again, hard to find 2022 CBA things but from here
https://tdnprod.wpengine.com/2020/01/07/the-comprehensive-cfl-collective-bargaining-agreement/
Their commentary provided here
Yes, you are correct in that the 3rd year TEAM option is included in the CBA and the Standard Player agreement in order to control costs for new draft picks. You may be correct in that the CBA language in that the salary structure of the contract may not be able to change as stated in the Standard Player Contract (teams may be bound to offering based on the structure laid out, not a minimum of 100% of the previous year + bonus).
What you can't seem to grok is that the Lions can literally let his contract run out by not exercising the option. Rourke would become a de-facto free agent and would not be bound to the third year option of his original contract as he would need to sign a whole new one.
Really the Lions have 2 options
1. Let Rourke test out his NFL option, lose him for a number of years based on how long he holds a clipboard and bounces around the practice squad... He may be released from his contract at this point... but his rights remain with BC? Like I've mentioned previously... hard to find exact language in the CBA around this. Presumably when he is done flirting with the NFL he could sign for whatever or have his rights traded
2. Reach an agreement with Rourke, allow the option to expire, sign him to a new deal (and hope no one swoops in with a ridiculous offer he accepts).