I think a lot the issues people are having with chroma are sharing circles with other aspects of Warframe that have to be addressed before any of these things get sorted out. Namely the type of game or content Warframe is going to be, pve is different from raids is different from pvp is different from open world is different from bite-sized is different from endless is different from FTP is different from fashion is different from waifu collecter. The issue lays within the game modes of warframe, and the issue isn't having all these different game modes, the issue is that rewards are not evenly distributed among them. Doing some content is quite more rewarding than doing other content, and that's the problem with having some frames do well with specific content. Because having content that is not worth doing means that there are some frames not worth using.
In a perfect world you wouldn't need to frame hop every couple of months to be able to efficiently do the most rewarding content. Nor would you be able to take your favorite frame to whatever content is the most rewarding, in a perfect world it wouldn't matter (except for enemy level) what content you would play because they would all give equal rewards (except for level difficulty). The main rewards being kuva, endo, relics, arcanes, credits, and affinity (discounting special event rewards). Right now, kuva is the only balanced reward in terms of variety of games modes to get it from and is only limited by the availability of game modes present. Endo is dominated by nekros+nidus, credits is dominated by tank+buff frames and mesa, relics you go to onslaught because it is the ONLY mode that gives radiant relics and you take high aoe dps frames for that. Affinity you take Equinox or if you don't want to do that, onslaught. And then you have arcanes, the holy grail of rewards because of things like guardian and energize which sell for incredible amounts of platinum. And remember these used to be obtained from raids. That means at any point in the future, any way of obtaining these rewards could change drastically. So drastically as to bring such a frame that had no place to the tip top of a meta, and then had to be nerfed. Why is this a problem? How are you going to design a tool if you don't know what job it needs to do? How are you going to design a frame when what the content the frame was designed for can become obsolete, not worth playing, no longer has the rewards that made it worth playing? Again, how are you going to design a tool when you don't know what job it needs to do? That's probably why we get so much overap in frame because if a warframe is to specific in its play style it might become underused, or not used at all, too quickly after release.
There isn't a problem to having many metas, we have spy, defence, eidolon, capture, survival, the problem isn't that there are many metas, the problem is that some metas are not worth participating in. Which means there are some frames that are really good at what they do, its just that its not worth doing what that frame is good at. Effectively making that frame obsolete, because its ranking among the other metas is poor, and because of that is not used in those metas which it performs poorly in. Its not about making Loki good in onslaught, its about making Spy missions worth playing on the same level as onslaught. And at the core of this is time, because if every mission in the game were to hypothetically give the same rewards, then players who play market frame would figure out what mission types give the most rewards per 20 minutes. So if DE could make every mission give the same rewards and take the same amount of time, then I think we would start to see better designing of frame because then the developers who design the frames would be able to craft the frame towards a specific type of content and would also help with reworks like Chroma and Vauban. Whenever the community brings up issues that are specific, like issues with chroma and worries about his state within the game, it feels like im looking at a jenga tower whose foundation is on one wobbli boi, And the community is sitting there discussing what top block to take off meanwhile no matter which topblock you take the whole thing is gonna come down because the root of these issues are so much further underground. Is chroma's kit a problem? No, its a symptom of game that has no place for him and doesn't know what he should, needs, wants, to be. I'm sure there many ideas of what Chroma could be, but out of all of them I'm pretty sure "being usefull in a team in more ways and game modes than one" is high up there on the list. Every tool wants to be useful, but its not the tools fault when it has no problems it can solve or when there are no problems worth solving. A useless tool is not a problem, it is a symptom, of the problem, of having no problems available to solve. And if you don't know what problems lay ahead of you which need to be solved, how are you able to make effective tools? You run the risk of making a frame and having become obsolete the vary next day.
I think this stems from DE declaring that they need to pump out new content in order to bring back players. This new content is different by design, and changes up the meta in drastic ways that have these sorts of effects on frames and the metas they preoccupy. But Warframe needs that new content. So what do, idk, I don't fix problems I just point them out and complain.