The challenge is it takes several years for a CFL quarterback to develop. If a QB comes to the league at 22-23 and puts in 3-4 years as a backup, he might become a starter (or hopefully a star?) at 26-27. Then, if the team can get 6-7 years out of him as a starter they're gold.
Now, if a QB starts in a spring league at 22-23... puts in some time as a backup and eventually as a starter, then developes into a premier QB who is not good enough for the NFL but outgrows the spring league salary* (*obviously we don't know how spring league salaries are going to play out) so he heads to Canada at 28 or 29. Now, he needs to learn the Canadian game. Based on history, that takes another 2-4 years as a backup. So you might get him as a starter at 32.
You're right, the league probably IS thinking that way, lol. Bury your head in the turf and and carry on with the status-quo until a problem really becomes a problem. That philosophy has worked wonders for this league for the past 40 years!
Let's say you're right and Spring football only lasts 5 years. That would only cause the CFL 5 years of quarterbacking issues. Nothing to worry about today!!! Bring on Touchdown Red Deer.
I'm all for the league implementing strategies to improve its product. I just believe in being realistic about potential threats. Panicked, knee-jerk reactions are not the best course of action.