I haven't gotten hung up with details like this. To my mind, if you're focusing on this kind of a detail, you're not immersed in the story. Star Wars has never been so much about the science than it has been about the story - witness TESB, where the Millennium Falcon travels at sublight speed from the Hoth system, to the Anoad system, and on to Bespin. That's a trip that should have taken YEARS.
Okay Nick, but next season when Din reveals his rocket pack can travel in Hyperspace, we will only have you to blame.
On the Falcon's trip to Bespin: It has been established in the old EU that every ship with Hyperdrive has backup hyperdrive engines that--while they move at a fraction of the regular hyperspace speeds, still far outclass sublight engines. It is still a point of mystery as to exactly how long they travelled / Luke trained, much the same as how my mind was blown to read an interview with Favreau stating in his mind there were two years between the end of Mando Season 2 and Season 3, most of which Grogu spent with Luke.
The first time any of this really "broke" for me to take me out of the story and I couldn't get past it was during "The Last Jedi" when the First Order had to resort to a sublight chase, rather than somehow flanking the Resistance with lightspeed maneuvers, which was then only further complicated by the jaunt to Canto Bight in the middle of said low-speed chase. Even then, I like the movie more than I don't, it just really really took me out of the moment.
What took me out of Mando even more than the rocketpack to space (which I poked fun at nonetheless) was the fact that Axe did that because the sky is scorched and no transmissions can get off the surface, a fact we have been told numerous times this season. So when it was revealed that Gideon's secret lair was underground on Mandalore itself, I had to question how he was chatting with his spies on Coruscant or the Shadow Council at all from there? It was sloppy for them not to address this with a line of dialogue somewhere.
And while I get where they were going with the clones, did they have to be 65-year old looking clones? At max he has only been growing them two years (see above, that's when he finally got Grogu's blood) and the master cloners on Kamino were impressed with themselves to have clones that aged at twice the speed, those things were not going to have a very long life if they aged 30x regular speed.
I thought the last two episodes this season lived up to my expectation of them being in the vein of those Transformers or GIJoe mini-series events where the status quo gets reset and new toys are introduced. I liked plenty in the finale, the laser gate gauntlet being a highlight for sure, and R5 vs the Mouse Droid felt like classic Star Wars at last.
I am hopeful season four sticks with the promise of bounty hunting Imperial remnants in an episodic nature. I think that is where the show will do its best work.