It is still not in development, I don't consider something in backlog development don't worry I did see that article and read it all I highly doubt crossplay will come between console and pc
Uhh again, I wish more players on here would read the development updates. As the devs HAVE announced, cross play IS being developed and input based matchmaking is near the top of the backlog. We still have 5 more Halo games to come out this year. I wouldn't expect cross-play until they at least near finished porting more of the games. It's in the works, so yes we will see it unless the devs decide to just drop all development. There's going to be a full year of development here. They claimed that all the games will come out over the course of 2020, so I expect to see Halo 4 drop around December with the rest of the games evenly spread out throughout the year, given the state of Halo CEA right now.
Cross play I highly doubt will even be announced by then, the goal right now is to get all the games including halo 4 on to pc before halo infinite release. Halo infinite will probably be the first halo ( first person shooter ) to support crossplay. Adding crossplay into mcc will take a long time and will be a problem implementing. We will probably not see cross play in mcc sad to state.
So far in my opinion halo reach is the only one truly affected by aim assist right now, Halo CE ( in flight ) I noticed does not have the same problems . Maybe because it is based off the Pc gearbox port? possibly. halo 2 in mcc is also based off the halo 2 vista port ( I believe so anyways) We will have to wait and see how halo three is before we can even see if it needs rebalancing as a whole once all the games come out in my opinion. But I notice how it is a lot more balanced in CE and when using a controller in CE it is not as overpowered as reach.By then, cross-play will likely be introduced with input-based matchmaking, making this whole debate irrelevant. I wish more people on here would read the development updates. Game development takes time, and yet the players expect pretty major design changes overnight.
As a software developer myself, if we have something in our backlog, that means it WILL get done, it just means we don't have someone actively coding on it yet because everyone is busy with current tasks. Doesn't matter what you "think" a backlog means. As active development features get finished, things will be grabbed from the top of the backlog to be worked. Considering they've been talking about cross-play for several development updates, it seems like it's near the top of the backlog, so I would be surprised if it doesn't enter active development by the time halo 2 or 3 is in the works, but definitely by halo 4.