I think the most off putting thing is the current aspect ratio since owning the oneplus pad pro. Going to 16 by 10 rather than 14 by 10 will help with enjoyment. It's unlikely to feel any heavier or unweildy. At this size, 2 handed use is already a given. Hope oneplus does a good trade in option, I'd be willing to switch.
A new report claims OnePlus is set to refresh the OnePlus Pad Pro it launched in the middle of the year. The "new" tablet looks set to retain most of the hardware of the standard Pad Pro, except for its display which sees a jump from 12.1" to 13" amidst other tweaks.