While there are many great suggestions on this thread, I feel like improved general effects would be the greatest improvement (and one that would appeal to potential buyers). I love my H9. I have two. I also love the theme – one pedal to rule them all. But I also run a möbius – for phaser flanger, Leslie, vol swells, etc. So I think the H9 needs some improvement to rule them all / be my precious.
I appreciate that one of the many things that makes even tide and the H9 great is that they are not just ordinary pedals. But sometimes we players just need ordinary pedals.
I do think the H9 / Modfactor is a bit behind other brand pedals. If you all released improved algos it would likely make a lot of current H9 users happy and would help to beat the competition.