If not, you will lose a lot of the old guard and then you will lose newbies because they can't play it solely on mobile.
They'll also have nobody to spend GM against, right?
Plus, with overheating issues apparently not unheard of, playability on mobile also seems somewhat limited anyway.
I've been redoing my due dilligence with revamp. It's just a major inconvenience all around. If I accept the step backwards that I cannot have several games open anymore, the next problem arises: Loading a late game (a 100p game where my coalition holds roughly 1200 pts - you can about estimate how many units and how much territory is shown on my screen) takes 1-2 minutes. Layer after layer of terrain will grasp its way to life and then it will take a good bit after that's done until any armies are actually shown. That's pretty cumbersome but at least it's a one-time initial load, I don't have a problem with that quite so much as you can pass that time. Where it really starts to sting is when you have to unload all of those painstakingly loaded assets to go back to the game selection and load another game for possibly several minutes, a process that just repeats over and over and over again if I'm home on a Sunday and it's raining outside or whatever. And with Revamp consuming so much CPU while doing all of that, I can barely use my machine for other things in the meantime.
Just compare this to the way I can access the game with Legacy: I click the button, it loads in a new tab. I click the button on the next game, it loads in a new tab. I click the button on another game, it loads in a new tab. After an initial load that takes a late game to even be noticable at all, all of those games are loaded and remain loaded and I can access any of them at any time immediately until I close the browser, fall asleep or the heat death of the universe.
Can you see how much more accessible this is and what a huge step in the other direction the new system is? It squanders the games absolute base appeal by making this glorified board game (which I hope you know I mean as lovingly as one could) consume resources at that level, that defeats the purpose. I really wonder why you guys ever considered it unproblematic enough to release it like this, sorry. The resource hunger of the game seems to affect players on the important mobile market very badly as well with battery drain and heating issues. If there's any one issue you should tackle first of any of them and with the most devotion possible I personally think from a player's and a business perspective it must be this one.
And uhhh...
We have the numbers - how many players are still playing Legacy and how much revenue this version generates
Well, duh? No account made since 2018 even has access to Legacy, you don't really need to have those numbers to have a pretty good idea of the general look of them. Especially since the mobile version has obviously created a major boom in new accounts since then. That comparison is seriously flawed in many ways, which doesn't make it worthless, but I hope you are not mistaking this as any form of statement on the quality of either UI? Under the circumstances, clearly you couldn't infer from that that the new UI was better, or even good at all. All it is is a measurable effect of the company's decisions on which UI people get access to in the first place. A more interesting number would perhaps be the amount of people who have access to Legacy but switched to Revamp vs. those that did not?