Problems with javelins mid flight
Heavy javelin and short spear turn into regular javelin mid flight and when they hit someone or something, this is not pleasing to the eye. also the recover time for the javelins is insanely slow, you would think that an archer would hold 2 at once. 1 in his throwing hand and the other to so he can quickly get a second shot by passing it to his throwing hand, as he is aiming/throwing/just thrown he can use his other hand to get the next javelin.
Also the Heavy javelin looks remarkable like the roman Pilum which if it didnt hit a shield would make it un-useable. i think javelin should un-shield a man