I don't know what games you played cause 

• Homeworld 
• Homewolrd 2
• Homeworld Cataclyst
• Total Annihilation
• Spring (and it's 9 different extensions)
• Supreme Commander and Supcom FA

All have equal assist with their engineers/repair ships

I'm sorry there's not much i can do about the confrontational bit . that is only an impression from your point of view.

In effect, I am side by side with the truth. that is all. nothing about that should ever come off as confrontational.

the fact of the matter is that is not the case.  I don't know why or HOW there can be so much misinformation floating about but a better way to test this would be to play the game and use economy overlay to witness the actual draw per extra engineer.

admittedly they did it for supreme commander 2 so I removed it from the above list. but that was one of the reasons I personally hated it and I wasn't alone in this.

I recall diminishing returns in SupCom as a result of the time it takes for units to come out of the factory. That delay caused the engineers to be idle, so the more engineers assisting, the more idle engineers, the lower the efficiency. But I recognize that is not what you are talking about, so I withdraw that example. Perhaps the diminishing returns design choice is related to micromanagement. Or maybe they want to reduce the ability for new players to crash their economy. Or maybe they don't have a reason. I personally don't see it being a bad mechanic. That is to say I have not judged the mechanic because it doesn't seem important.

You have edited your post to be a lot less confrontational, so it seems you do know you do it, you also seem to know how not to do it, and so when you do it it must be intentional. I recommend you use the less confrontational tone and you might get more people to agree with you. I was on the verge of disagreeing with you simply because you were being a jerk. Not the most logical of positions to take, but I am human after all, and don't need to waste my time on jerks.

Why Is there a need to punish the player at all, with diminishing returns ???????????????

isn't that punishing a choice and forcing the player to play with less options.......

all very plant vrs zombies to me so far.

The only reason i see them adding this diminishing returns is to force you to make more factories rather than constructors, like in PA.

However i do enjoy big numbers of constructors instead of factories because they are easier to harass than factories themselves, one of the things i enjoyed the most about TA was massive amounts of constructors switching around different factories.

Also it gives the player more control over what you want to build and how fast you want to build it instead of making more factories. Also its a gradual and smaler boost in production than you making factories, as it cheaper and faster to make constructors than it is to make factories.

Also the build power is mobile compared to static factories. I for example even enjoyed the massive swarms of air fabbers assisting factories, but that was a bit broken because you could instantly make defenses or proxy tier 2 facs and spam them at odd locations.

But since we only have land fabbers and they are kinda slow i dont really see why we should have diminishing returns per assist.

If anything the diminishing returns could only apply after a certain number of fabbers have been assisting but even then it doesnt make any sense.