This is just personal stuff but it's part of why I hung up my Mage after WoD. Now I'm returning for BfA because most ranged classes just look like ass or aren't what I enjoy. Boomkin was fun for Legion and despite it getting way better for BfA, I don't like being tied to one spec (and Guardian, my OS, looks like AAAAAAAAASS).
I just don't understand the point of having a tier that does nothing but increases damage like this. You could scrap the entire thing for something with more substance, but I'll just leave it on IF and never change it, just like WoD, unless RoP is a more meaningful DPS increase, which it never will be because they know plenty of people don't like it.
Edit: Legit though, props to anyone reading this who enjoys the RoP gameplay, I truly do envy you, but I just don't and I would rather it be obliterated once and for all.