Most ideas are not exclusive to just one platform. Even the developers have for years stated they want to keep both platforms as close in design to each other as possible.
Let's for the moment assume your idea gets implemented. How often are you going to use it to propose ideas specific to the App? How are you going to stop players who happen to use desktop from voting anyway? Desktop players can still play mobile and vice versa
More importantly, if you have an idea that's relevant to both Desktop and Mobile, what then? Are you going to require the same idea posted twice just to get it implemented for both platforms and not just one platform?
Also, voting requires enough votes for it to get forwarded. If you start dividing the amount of participants are you sure either portion of the playerbase will get sufficient votes to pass anything onto the developers?
In Ideas, how many of them added visual aids referring to mobile usage. Mostly everyone are not considering the mobile usage.
I like when
@Juber giving updates have separate section for mobile. But here in ideas doesn't have any separate section to see how it can be. Please take a glance in ideas present till today, how many ideas are discussed with consistency with mobile. Mainly focused on browser only.
How many are really wanted the change for mobile are not very clear currently. If any idea to be created for both mobile and browser, it depends on where the players want it first. They can create there. Dev's can make the call to make it consistency or separate approach. It will be like browser dev team forwarding to mobile dev team. FoE team can make Dev mobile team and Dev browser team to address the issue. Very manageable rite.
Inventory, fragments, market, army units screen etc are completely having different approach from mobile app. Having separate for mobile only increase the advantage of mobile users and browser people can stop worry about how it will be on mobile.
Divide them now, actually the game divided them long back how they play, look and feel etc of the game, only background logic is same. Myself expecting the same for forum site also. It will give full control to manage both the things(browser and mobile) very efficiently.
Sufficient positive votes receiving possibility after separation, on assumption I can say it will be huge on both sides. On the usage point of view, if they plan and addresses everything, it will give more clarity on their views and benefits by having a separation in the forum.