The point I'm trying to make is that Blizzard cares less about PvP than they did e.g. in WoD. We can argue about Ashran's flaws all day long but in the end it was some form of content and in the beginning (before you had horrendous queue times) I actually enjoyed it and it made gearing your alts incredibly easy. I don't really have numbers to back this claim but I also got the feeling that the PvP modifier changes happened more frequently than template changes in Legion but that might just be my bias because of my intense hatred towards templates.
Legion didn't really introduce anything for the PvP community except for new arenas and brawls (which is that retarded idea they seem to force on every Blizzard game now lul) when you think about it. Honor Talents were mostly existing mechanics that were ripped out of the original prepruning-classes and templates aren't really a feature to begin with since they only take away customization from PvP in order to provide a small group of players better accessibility under the pretense of better game balance.
All these changes weren't made for PvP players but for PvE players who dabble in PvP as rda already pointed out.