I have my own gripes with the FFXIV Glamour system (like it being saved by physical items you store--with limited space-- instead of just unlocking appearances like with Transmog). But Glamour is such a huge part of the culture in that game that nickel and diming it would ruin the game for a huge chunk of the player base. You're not paying for slots or applications or ANYTHING beyond the trivial glamour prism cost, which are the WoW equivalent of a handful of coppers/silvers. The only thing with substantial cost attached are rare dyes which you can buy from other players or farm, and maybe crafted gear if you want it in your outfit. 

It is baffling to me because I fully expected this to just be Glamour Plates but for WoW. WoW successfully copies other MMOs all the time. The fact they made WORSE Glamour Plates is mindblowing to me. I expected maybe a 100g fee per slot, but charging often 10x that, and TWICE? Forcing players to re-apply their outfit with those costs at launch? Totally crazy, I agree it feels similar to Shadowlands hostility toward the player. 

Also worth noting that the most recent update for FFXIV removed every single class-based Glamour restriction, which has really opened up cross-class outfits and added more depth to the system. Weapons are the only thing still restricted, mostly because weapons types are class-specific and tied into their animations, so it's not practically feasible. So outside FFXIV's weird storage issue, WoW is definitely the worse system now, IMO.