I want to say first that this is a wonderful piece of software and my hats go off to the developers.
I've personally been using IPB for two of my websites and honestly; it's a bit of a headache to deal with. Once node becomes more stable I will def look to switch them over.
Some things I would be interested to see:
1.) Ability to control the menu bar
2.) The custom home page feature is great, I'd like to see it expanded into a feature that we can actually add multiple pages. Sort of like what IP.content is offering.
3.) Botscout, stop spammer integration.
If I think of more I'll be sure to reply I know this is a growing community and the support here is 100x better than IPB's so that is a HUGE plus for a guy like me. I'm not 100% tech savy, but with a little help I can figure things out on my own. I set up my server finally....but that took like 3 days but I did it!