Baumi
Adventurer
I don't know the PF Magus, but in 5E there are multible ways to play an Warrior/Mage so there should be one for everone. 
The Eldritch Knight is 80% Fighter and 20% Wizard, maybee even less. It's for those want a pure Fighter (Weapons, Toughness, up to 4 Attacks,..) with some offensive and defensive Spells from the Wizard (up to 4th Level).
Then there is the Warlock and Bard, both full-spellcasters with d8 HD, light to medium Armor Proficiency and the ability to get an Extra Attack. So they are a bit like Clerics .. tough Spellcasters who can stand in the Front line. The Armor is a bit lighter, but they have better Weapons and Arcane Spells.
And Lets not forget the Paladin and Ranger. They are quite good 1/2 Casters now with very good Combat Options. While the Spells are Divine, they have a few unique Spells that are quite offensive and great for any Warrior/Mage, like different kinds of Smites or Hunter's Mark.
Oh by the Way the Barbarian and Monk can now cast a few spells themself, depending on their Specialization (Heck the Barbarian can even fly!).
The Cleric and Druid, like always, are also quite good Warriors themself, the Tempest Cleric even gets heavy armor AND martial Weapons. In fact the only one that will be really hard to optimize for Melee are the Sorcerer and the Wizard.
I haven't tried Multiclassing yet, but at first glance it seems quite bad to me, since it share the same problems as 3E (you don't want to delay Spellcasting Levels), for the Warrior Classes its even worse since the Extra Attacks also get delayed.
The Eldritch Knight is 80% Fighter and 20% Wizard, maybee even less. It's for those want a pure Fighter (Weapons, Toughness, up to 4 Attacks,..) with some offensive and defensive Spells from the Wizard (up to 4th Level).
Then there is the Warlock and Bard, both full-spellcasters with d8 HD, light to medium Armor Proficiency and the ability to get an Extra Attack. So they are a bit like Clerics .. tough Spellcasters who can stand in the Front line. The Armor is a bit lighter, but they have better Weapons and Arcane Spells.
And Lets not forget the Paladin and Ranger. They are quite good 1/2 Casters now with very good Combat Options. While the Spells are Divine, they have a few unique Spells that are quite offensive and great for any Warrior/Mage, like different kinds of Smites or Hunter's Mark.
Oh by the Way the Barbarian and Monk can now cast a few spells themself, depending on their Specialization (Heck the Barbarian can even fly!).
The Cleric and Druid, like always, are also quite good Warriors themself, the Tempest Cleric even gets heavy armor AND martial Weapons. In fact the only one that will be really hard to optimize for Melee are the Sorcerer and the Wizard.
I haven't tried Multiclassing yet, but at first glance it seems quite bad to me, since it share the same problems as 3E (you don't want to delay Spellcasting Levels), for the Warrior Classes its even worse since the Extra Attacks also get delayed.
