I think the long jumps are just there because of the limits of programing and animating CRPG. An open map, auto following and such plus both real-time and turn based combat just kind of makes it really hard to deal with little animated characters running around with exacting jump distances. Further, while animating characters and creatures of different sizes, and all of their varied armors and equipment, climbing up small heights rather than jumping would look better it's not really economically feasible (yet) for a game like this. So, while I would also love a fully realistic way of dealing with climbing and jumping in BG3 I get that that cost vs benefit just isn't there yet.
On the other hand the Shove thing is a travesty and it need to be address either by Larian themselves or a Mod, preferable the former, but there are already a few threads on that point
