here is my take on styles;
Defense: +1 AC,
Archery: +1 attack with ranged weapon attacks, +2 damage,
Weapon and shield: +1 AC from shield bonus, +1 weapon damage with single one handed melee weapon,
Twohanded weapon: +1d6 damage with twohanded melee weapon attacks,
Shield wall: while having a shield, give +1 AC to adjacent allies. Single ally cannot get this bonus more then 2 times(if there is more allies with this style around them)
Blessed/Nature warrior: get 2 cantrips from cleric/druid list, gain one extra cantrip at 8th and 20th level,
Thrown weapon:
you can draw thrown weapons as part of the attack,
double normal range of thrown weapons(if you have SS feat, add 50% to total range),
increase damage dice by one step while throwing the weapon,
You can throw any one handed melee weapon that you are proficient at the range of 10/20ft for 1d8 damage or 1d6 damage if it is a light weapon,
Reach weapon; while fighting with a weapon that has reach, increase the reach of that weapon by 5ft,
Two weapon fighting: add ability modifier to off hand damage and make off hand attack as the part of Attack action. If you have Extra attack feature you can make second attack with off hand weapon as a Bonus action.