If we want a simple spotted lion...
We can return to Rend only.
Pounce could be: "Move 20 feet in a strait line into an opponents space which is smaller than the Lion. That target must make a DC 17 strength save or fall prone. Then Rend."
We can cut out Ferocious Bite and make Retributive Claw do full Rend damage.
Add wording on Rend that it only grapples if the Lion doesn't already have something Grappled.
As noted, Feline Speed becomes a 2/short rest (4x speed, disengage).
I maintain Pack Tactics is sort of redundant. Between knocking prone and restraining, it has plenty of ways to generate advantage.
Keen Senses is already reflected in its expertise on perception. Without a cheap way to use the Search action, it isn't hugely likely to show up either. You could just kick up the passive perception by 5 and strip the feature. (Btw, it should have 22 passive perception, not 17, as written; you forgot advantage on passive is +5).
That removes 6 out of 10 monster text blocks, and the fight with the resulting feature is going to be 95%+ the same as the fight with yours.