Body-blocking has the potential to ruin runs and it's kind of antithetical to TFT
Pretty simple here. TFT is ostensibly a game mode that tells entirely on luck and decisions and does not require reflexes or advanced mechanics.
There is no reason that Little Legends should be able to body block other legends from getting their choice in the roulette. The champions are close enough together that, not only does them overlapping a champion you want needlessly obscure what has and has not been chosen, but you can actually be patched into choosing a different unit entirely.
You should either be able to select who you want independently of using your little legend to walk to it, or, once you make you selection, you should be automatically jettisoned to an outer ring so that, if you really really want to body block, you can only do so if you delay your own selection, and you risk choosing the wrong thing yourself