When the X-H1 was introduced, it was described as a sibling lineup; specifically an approximately 60/40, video-weighted hybrid that also shot great stills. It had a larger body and grip, not just to facilitate the IBIS system, but to give it better balance with larger cinema lenses for owners seeking a capable video camera. The X-T series was defined to be exactly the opposite ratio; a stills-centric camera that also shot great video. However, like the odd inclusion of a factory adjustable leaf spring shutter switch on the X-H1, a feature that's more coveted by stills shooters, the X-T4 has also incorporated a couple of weirdly out of place features that betrays Fujifilm's original description of the X-T series being stills-focused.
Like it or not, the Fujifilm X-H1 has no real reason to exist. If the X-H2 is to happen, it needs one to justify its status as the "flagship" of the X-series range Fujifilm claims it to be. When it first came out, it was $2000 for basically just a $1500 X-T2 with a bigger grip and IBIS. Sorry, but that's not gonna cut it if they plan to release an X-H2 with X-T3 guts at the end of that product's lifecycle, especially if they plan to price it above $1500 again. It needs a real reason to exist and I have an idea.