Personally, felt the finale was sub par. Which is unfortunate, given the previous episode and some of the previous episodes this season that were much better. Still better than much of Jodie's era, but still poor in my eyes.
1. Draging Sutekh through the Time Vortex, but when Sutekh tried to halt their movement through the Vortex by clawing around them, that destroyed his past without damaging them in the slightest or hurting themselves. Yet when they get released afterwards into it (Time Vortex), they "die" from it? Yeah, no. Logic fail there. If they weren't being hurt by plunging their claws and apendages into the Vortext prior, there's no reason they should die from it after - they should just pop up back somewhere in Time instead (given what viewers have been told about the Vortext prior).
2. "Who's that Pokemon?" Really? Sutekh, a God that has devoted themselves to becoming something, an Avatar of something if you will, who would have been happy being the only thing remaining after all is dust in reality. Suddenly cares about something else? Should have taken the easy way out and gave them a love interest instead. Both just as believable given the writing of the series finale.
3. A Death - to Death, equals life? Sure, if you want to be philosophical about it, you could get away with that. But that also relies on being able to undo it, and thankfully you could with Time Vortex shennanigans. However, conversely, this should also absolutely mean that Sutekh can be saved from their "death" and all reality is screwed still. Which means this "Death" means nothing. They should have gone full steam ahead, and made it so The Doctor is killing Sutekh constantly. That way, it guarantee's the "death" of Sutekh by preventing them from escaping by becoming the "Death" to the God of Death that they had the Doctor proclaim so loudly, and also adds to the Character of the Doctor. How far will The Doctor go(/fall) to save reality? Which then puts the philosophical question of at what point is a monster really a monster? At what point is an Angel a Devil? All of that good stuff, sadly, not there.
4. And let's not kid ourselves about the rope/cord that was used on Sutekh to drag them into the Vortex. Sutekh "dusted" non-living stuff as well (as shown in this and the last episode). So that rope/cord should never have been able to get onto them, much less drag them around. Especially when you factor into the idea that they implied that the touch of Death is able to undo their actions by killing them in the various time periods they were in. Meaning no rope/cord would have been able to realistically get onto them, much less drag them around without them being able to take a swipe at it to break it.