The dome let's 5-10% through on purpose. So that the Israeli population never gets too comfortable.
Also Iran wants to avoid full scale war at all cost, to them losing face is better option than being sucked into all out war.
Iran's plan is to first acquire nuclear capabilities and amass at least hundreds of warheads with weapons grade plutonium. Until that objective is achieved they won't waste core arsenal of their missiles and drones.
Israel knows it won't be able to stop Iran from getting nuclear capabilities without a full scale war. So for now they will do everything they can to delay them and if possible provoke further escalation.
I doubt Iran is going to take the bait and try to seriously damage Israel. Their IQ is too high(human capital) and social cohesion of the Shiite cleric is too strong.