So if a Magus wants to combine Spellstrike with a line, area, or cone spell, they can do that with a 2nd level feat. An archer magus can full on shoot fireballs around with just a 2nd level feat (and obviously some way to cast fireballs). That's fantastic!
But if a Magus wants to target three whole people with Fear, they need to be 20th level, using a melee weapon, targeting people who are adjacent to each other, and spend their whole turn to do it.
I don't get it.
What is the power level concern that prevents Magus from having a version of Expansive Spellstrike that reads "when you cast a spell that can target multiple creatures as part of a Spellstrike, you can target the full number of creatures but must include the target of your Spellstrike"?