Another idea for balancing the Mimot would be to reduce the percentage of manufacturing that goes to the shipyards.  That way it would take longer to produce the 2 ships.  For example, if you reduced the percentage by 1/3, it would take 50% longer to produce the 2 ships than it would take other civs to produce 1 ship.  By tweaking the percentage the devs could reach a balance that they find desirable.

Another possible adjustment would be to reduce the manufacturing of worlds owned by the Mimot by some percentage to achieve the same result.

The double-supply ships does seem to me like an unintended consequence of their double-ship ability.

This definitely does make sense to me, and strikes me more as eliminating an exploit/loophole than a nerf.  I'm guessing most players would agree that double-supply ships doesn't make sense for anyone to have..

-tid242

Agree 1,000%. 

Currently the only way to play is not have them in the game. Otherwise, they are incomprehensibly powerful by midgame--stronger than all the other factions combined. They need to be patched ASAP.

The last game I played (which I actually never finished) was an interesting one. I was playing with several large sectors and they all ended up being (for the most part) positioned in a line, with me being at one end. Because it was a lot of space to cover, I never actually got around to exploring the further reaches. I remember sometime mid-game thinking I was doing pretty well because my score was on par with the other high scorers I had met so far. Then I met the Altarians and the Drengin probably around turn 100, who both had nearly double my score. (I know score isn't the biggest deal and for the Drengin it's mostly military; still I get nervous when my score falls too low compared to other civs.) I thought, well I guess I have to catch up. Fast forward another 50-60 turns. I'm still not caught up, but I'm maybe halfway there. Then I meet the Mimot, who (as far as I can tell) are positioned on the far end of the galaxy. They have a higher score than the Altarians and Drengin combined.   

Mimot -25% HP is per ship, so you get 2 ships for the same HP as 1 of the other races.

However this is not Stellaris. Logistic play very important role here. A fleet of 16/16 with Small hull Mimot is weaker than any other race 16/16 fleet. No matter the tech, the NPC will get the same logistics too. And fleets are 1 vs 1 so Mimot exchanges the ability to field 2 16/16 instead of 1 but their ships will die the faster. Against well balanced opponent they will be wiped out. 

Good example are the heavily guarded relics. All other races if you drop 16/16 (8 ship) small hull beam ships, they will lose some but not all of them against the guardian (2-4). Mimot will lose all the ships from the first attack and most of the times 5 ships from the second wave. 

You get double the auxiliary ships true, however that reflects Mimot ability to reproduce fast. Their planets get cramped easily with huge penalties if not careful at the start of the game. 

Also Mimot as a race have serious issue on Intelligence trait. You are ALWAYS back tech wise no matter how hard you try. Their brightest civilians are around 4 rarely 5. Their commanders can get to 8 but they are extremely rare. Most other races get 10+ Intellect pretty easily getting a tech head start. 

Same applies to Diligence, you will struggle to find high Diligence Mimot. They are all hovering on 5-6. Even commanders are very rare to come by. Have to wait many turns to get one with high Diligence, Intelligence AND Resolve to use in command ships or factions. 

Imho Mimot is a pretty weak but very very fun race to play and should stay as that. 

yeah the more space you have, the better the mimots do. also though, something the ai may or may not take advantage of sometimes is the fact that the mimots are designed to use missiles right now. they make glass cannons anyway, and with missiles they get 2x the attack power for missile volleys. if the ai actually takes advantage of this and uses a bunch of ranged attacks with missiles then they'll do even better. i warned em before the game came out that mimots were on another level all they need is room to grow...