I mean, yeah, express ideas to your heart's content. If it was feasible for KHI to be working on an app for the site/forum, you'd have heard at least something about it, so the fact that we haven't should tell you something.
The smart phone generation has been in full swing for several years now - you'd think if KHI had the resources and/or people to create a good app, they'd have jumped on the opportunity long ago. Right now it's probably beyond the reasonable scope of anyone on the forum to develop an app that's even slightly better than the mobile site skin we have going right now.
Suggest what you will but if it's this really vague thing that would be good to have (like making an app for the site) and we don't have it already, it's probably because of technical or resource limitations that the site and forum staff simply can't get past. I'm not saying you or anyone should stop putting forth suggestions, I'm saying it can be helpful to also be critical of your own questions and ask why your issue or suggestion might not have been addressed already.