Hahah… yep. I’ve been farming T4 for about 2 months. In that time…
1 3ga mythics
4 2ga mythics
50+ 1ga mythics
6 4ga uniques
15-20 3ga uniques
15-20 2ga uniques
1000+ 1ga uniques
80% of legendaries are 750 instead of 800.
While there is a noticeable difference in difficulty between T4 and T1 bosses… I see no difference in loot. 
98% of my T4 drops are salvaged.