Interface.CallHook("OnLootEntity", (object) this.GetComponent<BasePlayer>(), (object) targetEntity);

can be improved and optimised to

Interface.CallHook("OnLootEntity", (object) this.baseEntity, (object) targetEntity);

P.S. You can check how EntityComponent works, which is base of PlayerLoot (PlayerLoot : EntityComponent<BasePlayer>)

public class EntityComponent<T> : EntityComponentBase where T : BaseEntity
{
  [NonSerialized]
  public T _baseEntity;

  public T baseEntity
  {
    get
    {
      if ((UnityEngine.Object) this._baseEntity == (UnityEngine.Object) null)
        this.UpdateBaseEntity();
      return this._baseEntity;
    }
  }

  protected void UpdateBaseEntity()
  {
    if (!(bool) (UnityEngine.Object) this || !(bool) (UnityEngine.Object) this.gameObject)
      return;
    this._baseEntity = this.gameObject.ToBaseEntity() as T;
  }

  protected override BaseEntity GetBaseEntity()
  {
    return (BaseEntity) this.baseEntity;
  }

I'm not seeing where this is to be changed, it looks to already be the suggested change.