They should have maybe started the DMA story slower and stuck in a few Harry Mudd style episodes. Doing a season arc doesn't have to mean you do nothing else
To be fair, they haven't done nothing else. Episodes 3 and 4 had almost nothing to do with the DMA. Three had the A plot with the rogue Qowat Milat and Grey getting incorporated, with just a tiny slice of DMA when Stamets and Book went to Ni'Var. Episode 4 was mostly about Tilly and the cadets, plus intrigue on Ni'Var, with the only real reference to the DMA Culber helping Book work through his grief.
The problem is, after this, they stopped. Episodes 5-9 are all DMA, all the time, even though there's some tangential side quests, like saving prisoners or the casino planet.
agreed: assuming the DMA story will turn out being a good one, which I fervently hope, they should have done like 5 or 6 episodes with standalone stories before destroying kwejian unexpectedly and begin a more focused last part of the season. This would have allowed to develop the relationships and also kwejan itself, which we basically didn’t know at all.
From what I can see, this season isn't really about the DMA, as much as it's about Michael and Book's relationship. They could have found ways to center the relationship early on in those adventures. Maybe have Michael and Book talk about possibly having a child or something.