Main problem I have is the reply function, which works half the time on my iPhone 6. I now use the edit function to post replies , otherwise, half of them end up three posts below my original quote.Also, it's tough/ time consuming to scroll through all the subjects in the Stadium wall and ( I'm lazy, I admit) but the " search" function requires me to hit the icon in the corner, pick forum and type in search words. Auto correct comes into play and it's just a pain in the arse.
If there was a TT group that showed all sub groups of TT threads it would ease finding my particular subject.