One common optional rule used in D&D 5e is the ability to forego two +1 ability score increases, and instead gain a feat. I REALLY hope that this is included. The feats that I wish most to see included (from the PHB) are: Durable, Elemental Adept, Healer, Mage Slayer, Magic Initiate, Martial Adept, Mobile, Resilient, Ritual Caster, Shield Master, Skilled, Spell Sniper, War Caster, and Weapon Master.
