Please add formats like Modern and Legacy into Arena eventually. There are large amounts of people like me who would very much like to play them and put money into the game in order to play them, yet refuse to play MTGO (because of its horrible UI) or paper (I prefer playing lots of matches daily, and in a videogame rather than a physical card game with social interaction).
I am sure that you would make great amounts more profit if you added such older formats to Arena. There must be very large amounts of people like me who are willing to spend money on Arena to play them.
And if such an amazing decision were to be made, could you communicate to the playerbase on the plans to do that eventually, instead of having us wonder about the future of Arena for years and years and only ever getting info right before releases. This seems to be a huge issue in general, for example even though we are supposed to at least get all Pioneer legal sets into Arena, we have not heard a single word about Shadows over Innistrad remastered yet, despite Amonkhet coming a year ago and Kaladesh something like 7-8 months ago. Can't you at least communicate to us on what the current plans and schedule are for such things?