Have no idea what the WAR stuff means but he is getting better. Needs to work on his defense.
WAR measures his value relative to the ML-average at his position based on runs created by hitting, walks, and baserunning, as well as runs saved by defense. If your WAR is 0 or negative, a replacement level player can do better than you. 1-2 is ML average. 3-4 is solid. 4-5 is all-star. 6+ is MVP candidate.
Taylor has been the best outfielder in baseball this year according to fangraphs