I’m not a huge fan of uneven divisions either but in this case I think it makes sense.

Doing 8 4-team divisions splits up a ton of historic rivalries and 4 just seems too small for a division.

Unless you do a lot of swapping between AL and NL, 4 divisions of 8 are also problematic and lead to divisions with teams spread across a few time zones and you still end up splitting rivalries.

Right now Portland and SLC are the two markets with ownership groups & stadium plans in place and who are ponying up a lot of public money so why not add them both, put them against each over as rivals and move the Texas teams to where they are playing most of their divisional road games in their own time zone (and as a bonus, the Astros get to reunite with most of the teams they’ve played historically).

I think baseball would be comfortable sitting like that for a long while, or as an intermediate stage to 34. Baseball has enough wild cards now that the disadvantage of being in a bigger division is less consequential. They could even bake it into tie breaker procedure—giving the nod to the team coming out of the 6 team division over one from 5 with the same record.