The three scenes that annoy me the most is the end of the first vader battle, were Obi Wan is saved by fire. That Vader can either walk through (as he has in other stories walked on lava), jump over and or around, or just put it out or lifted Obi Wan over it.
It’s a hard fix, but I think the easiest solution, might just be to just cut to black after the explosion and then go to Obi Wan waking up in the tank. Because whatever the audience imagines in their head will be better.
(I know you can say that part of Anakin was disappointed in the battle, and or felt sorry for him. Or maybe just repaired Obi Wan for leaving him after he got burned. So he let him escape, but at that scene it didn’t really land that well.)
Another alternative could be to add extra blasters going of by the end, so it’s sound like she got support after blowing up the tank. Then Vader would at least have had something else to worry about.
The other scene is when he pulls down the spaceship and the real one just sits in the background and then takes off. Again here it feels like they want to go with that Vader’s force stamina is just exhausted after one attack, but that is not portrayed well either.
However the scene is rather fun to see him pull down a ship. So to fix it, it’s better to try and have the other one take off, just as Vader rips the other one appart. IF it can be aligned with some masking. Then he would at least be occupied as it gets up in the air. Could also cut to Reva getting up behind him earlier so we can see that his focus now is on her.
Last is when he stabs Reva after just telling her that Siths sometimes survive that exakt stab. I mean it’s a really odd scene, since they didn’t make it look like Vader wanted to give her another chance, but maybe if something is added, it can sound like he tried to make her get more powerful in hopes of her going after Obi and the rest in someway (So it’s proceeded that he is still playing mind games with her). Or just cut the scene with the reveal with the inquisitors return, and the earlier stab he received by Reva so that he is just alive somewhere in the background. Then they won’t at least make fun of her for failing to kill someone with a stab as Vader then proceeds to do the same.