Very true. Although depending on the mechanics of of combined Mega and Primal limits I imagine non-primal Groudon will become a very rare sight. And for that reason non-primal Kyogre will become much less common too
Yeah, I was reflecting about the pros and cons of Kyogre and Primal Kyogre.
Assuming no stat changes, since I don't want to speculate wildly:
- Kyogre can use Choice Scarf to outspeed lots of threats and hit hard with rain-boosted Water Spouts/Hydro Pumps as it has always done since gen 4. Still effective, but now it was to watch out for Primal Groudon and can't even hit it super-effectively with Ice Beam. A decrease in usage is to be expected.
- Primal Kyogre still has issues with switching into Primal Groudons non-fire moves, but it can always come in after a team-mate has fallen or a slow U-Turn. It has some perks over regular Kyogre in that it doesn't take damage from fire moves, and thus has an easier time staying healthy for Water Spout. On the other hand, Kyogre has never particularly fast for Ubers and that isn't likely to change.
Since primal devolution has been shown to activate in battle, I think it's safe to assume it's just another name for a mega evolution and there will be a 100 BST increase, so that Primal Groudon's attack/Primal Kyogre's sp.atk will lie between 180~200. This will further expand Primal Kyogre's edge over Scarf Kyogre, but the speed will always be an issue.