This is more an observation based on data, and not anything game changing… but I found it interesting.
I started playing 12-Sep-2018 and have always done same color feeding. I’ve tracked all my heroes and noticed that I get more Red XP than other colors. This seems likely due to the fact that there are four Red 2-star heroes vs. only three in all the other colors.
My tracking data started to get muddied with the introduction of Costumes, but I normalized the data to traditional hero XP as best as I could. Duplicate costume feeding is hard to account for, but seeing as how I have the least amount of Costume XP in Red that only further supports my theory.
The data was muddied more with PoV and its single color Trainers. I haven’t used any of the Red Trainers from PoV2 yet. But the Blue numbers are a minuscule bit inflated from PoV1.
The final muddy factor that I can think of is the few times I’ve had to feed heroes for zero XP in order to finish max’ing a SS when the hero has already max leveled.
So… given my data I expect the RNG allocation of feeders works as:
RNG determines 1-star or 2-star
If 2-Star then select from all available 2-star heroes
vs.
RNG determines 1-star or 2-star
RNG determine which color
If 2-Star then select form all available 2-star heroes of RNG color
I’d have thought the latter would have been more equitable. But I guess it also makes it harder to pull a specific Red 2-star hero.
I feel like I have seen a chart just like this before on the forums. But this type of search is obscured by other posts like red hero ascension advice, and red hero team advice.
The chart @zephyr1 posted from @Garanwyn was based on ~4K feeders. I figure my data is based on ~90K feeders, a worthy sample size. Both point to a significant increase in Red. I really doubt it’s RNG.
With as much of this game that’s based on RNG odds I find it extremely unlikely they don’t know about it; but as you say, they probably don’t care.
They did not know about the red/ yellow 1* troops and did not fix until 2018-June ( Barracks was introduced 2017-June ).
One of the advantages of transparency, is people can double check your work. And warn you of possible problems ( looking at you advanced color stacking ).
But Devs probably have known about 2* red heroes since 2019-February ( see above replies ).
40% of colors
I just realized the red/ yellow 1* troop issue was much more severe than 2* red heroes.
The imbalance effected -50% XP of 40% of colors and 75% of troop loot drops with -100% penalty for off color leveling.
While red 2* hero effects +25% XP of 20% of colors and 25% of hero loot drops / 50% of finished recruit training with -16% penalty for off color leveling.