A brilliant question, but I fear no one really has an answer to it. I've trialled the APP, but for my reasons above, it's of no use to me.
For mobile use, it's a lost cause in my eyes. I'll always prefer to sit at a desktop/laptop and browse that way. But, we can't forget the x amount of people who prefer to do everything on their phones. I usually try to tell users that for the best possible experience, use a desktop. But, even this has backfired. I know people personally who don't even have a computer/monitor. They simply use their phone or tablet for everything as that's all they require. A little search of Google here and there and FB for everything else.
Personally I don't think forums are for phones... You just don't have the space. So, I hope we do another transition in years to come and go back to PC's or bigger screen that make use of a desktop view.
For now, I plan to do nothing as there is nothing that can be done that would cater for my needs. I'll just have to take the hit and hope it passes, as I won't be sinking any money into a hobby. If I were a business I'd make my own forums/app and have it all in house.
IPS are certainly in a pickle. But if you only use IPS applications, then their app will bridge some of that worry. But then you've got to get people to download the app in the first place. I'm very interested to see what is done, and see if we can fight back on the social media aspects.