As far as Slik's strategy, I don't think you'd need to release guys after 2-3 years. If they worked, got over and then started to get stale, you could just transition them into a part time role in the hopes of creating that Lesnar part timer aura. It too hard to find stars to just throw them out after a couple years.
Also, fake injury angles to give guys time off, keep them fresh character-wise and stretch out storylines are underused in wrestling.
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