Because of the nature of ballistic missiles, projectiles do land in an elongated elliptical pattern like that, usually in the orientation from where the missile is launched from.
Interesting that only three of the six submunition packages landed on target. Those that landed on target managed to pierce straight through 10 storey buildings though.
Not to this extent, and with the recent ceasefire deal and Israeli presence on Lebanon's border with Syria, the amount of Hezbollah infrastructure that will exist south of the Litani river is uncertain. Supplying Lebanon by sea means having to go through the Suez canal and past the Israeli Navy. Shipments to Lebanon would have to be directed first to "man in the middle" countries like Greece and Italy, and then Lebanon, to try evade interception (direct shipments from Iran to Lebanon would be highly likely to get inspected, and this kind of tactic was used in the past). It's quite different from Iran supplying Yemen by sea directly, where that's not an issue. And even then, just yesterday Israel bombed Yemen's port infrastructure, including tug boats at civilian ports, to prevent Yemen from receiving Iranian shipments. Israel could do the same to Lebanon and no one would stop them realistically.
Losing a land supply route is a negative, there is no way around this.