The only fatalities in MKD that were exaggerated were Bo' Rai Cho's and thats because he's a gag character. Everything else is fairly realistic and fully possible for the characters.
In fact Sub-Zero's freezing then breaking off the legs of his opponent is his most awesome and intelligent fatality to date.
Starkiller brought a Star Destroyer (one of the largest warships in Star Wars) down.
One of the strongest Sith ever ever performing possibly the second best TK feats in SW history. (#1 going to Nihilus pulling the Ravager from a gravity well and holding it together)
Yoda, Dooku, and Palpatine have been shown lifting and throwing heavy objects using TK.
All far more powerful than Sion could ever hope to be in terms of Force powers. Also as per the films Dooku and Palpatine had gravity on their side as they were breaking things to make them fall and throwing pods downwards.
Let's not forget the Force Crush which an make a victim implode. Windu used a force crush to rupture Grievous's lungs and Starkiller used it to destroy an AT-ST.
Both of them being much stronger than Sion and with better feats in..everything.
I'll remind everybody of two very simple things.
1. We are talking about average Jedi.
2. We are talking about Darth Sion's telekinetic powers.
Nobody seems to be able to remember this.
Dooku has used TK to give himself flight.
A feat NEVER AGAIn replicated in Star Wars. It's obviously been forgotten.
Sion held his decomposing body together using his Force (which gave him immortality to some extent).
Agian, soul suck.
Face it, Star Wars TK > MK TK.
WHne you use the bests of the strongest Jedi and Sith in history, sure.