I think the majority would agree that the new features would definitely improve Clutchfans, but the design should be slightly more similar to the main CF look, people really like Clutchfans for the clean and more text-based look. The current CF-style allows for a focus on actual discussion and text, without the distractions and cluttering of more modern design choices.
That said, I think nearly everyone likes the new mobile version and format, so you could probably keep that or only slightly change it.
Regarding additional features, I think the Forum X/New software definitely should include the multi-reply feature.