We strongly recommend giving the seamed pattern a try! Seams are vital to knitted garments' structure and integrity. Read more about why Amy prefers to design seamed patterns here.
If you're not convinced seams are for you, that's okay! Every pattern does include an option to work the body of a sweater in one piece, with the sleeves top-down using short rows. That's a great option for someone who is used to raglans but doesn't want to learn to seam.