There are a couple of things I would like to see in the forums here.
One is the ability to lend agreement to an argument without actually contributing to it. Take the ironskin debate - It would I think add to the entertainment value of the debate to be able to 'side' one way or another - a reader could see that x many registered members agreed / disagreed with a point of view. It might even provide the proponent a measure of comfort and reassurance (no matter how hard-assed you are, it's nice to be agreed with). Cluttering the debate with expressions of support as written messages that do not add to the debate is just noise (note that I am not pointing to any message, except the one I almost added myself).
Another capability that would be nice is the ability to rate things, such as the individual scenarios in the original and in each expansion, or perhaps even the 'worth' of certain cards, or even each and every card. I recognise that rating systems can be corrupted, that it's nowhere near as simple as it looks to do it well, and the sample sizes in this forum might not be big enough to overcome undue influence, but I'd still like to see the capability here.
It does not seem that the current forum structure allows for these capabilities, and the ability to collect that kind of feedback on the game could be useful to FFG and possibly even influential to future expansions.