Are they planning a Dev Clash in Hoi IV? I would be very interested in watching that!
Anyone with a lot of competitive MP experience can tell you from past videos that the devs are pretty bad at this game. Where as they're generally alright, with some even being very good at EU4. That alone makes EU4 dev clashes much more interesting.
Then there's of course all the other tools that we don't have in HoI4, like the ledger, log, outliner, etc. other data displaying mechanisms that makes EU4 more interesting to watch.