My plugin, Universal Cursor Hotkeys (0.8.0), fixes several of the issues reported in this thread.
5k/5jnot crossing rows (@cryingpotato)xfailing at cell boundaries (@VoidAwake)w/bnot crossing cells (@goatstream)
No special table-navigation commands to learn — your existing hjkl (and w/b/e, gg/G, etc.) just works correctly inside cells now.
dd, o, Visual-selection-across-cells, ., and scrolling are still open.
Full write-up (w/ demo): Universal Cursor Hotkeys — 0.8.0