I took the tiger sprites from the @duracelleur: rehyped version.
I'm late to the party, I know... Sorry!
Personally I prefer this version over v4 you showed later. Somewhat the standing knee kick pose you use for the finisher destroys the flow for me in your later videos.
So why not take both? First for weak version and second for strong version?
As I don't mind edits to go far astray from the source, I don't really buy the "it doesn't fit Sagat" argument...
Though on the other hand, I'd stick with the brawling excluding the tiger shot energy. I'd say it will look more brutal without additional SFX.
This spoiler is just in case you might be still interested in another melee finisher idea.
Spoiler, click to toggle visibilty
Despite my redundant 2 cents here, I like this crazy fiend of yours! Thank you!