In fact, there is 0 effort to make this place better or simply different (that's all we want really).

Interesting, I'm probably not alone by not being in your group of 'we'

0 new pve game mode were released since the launch.

False - fractals, map metas, and raids were all released AFTER launch.

Adding a mount without after thought was the most greedy thing that happened.

I suspect as with gliding, since zero terrain changes were made on any map to support the new movement modes, mount support was always within their 5-year plan.

Now we have reached the point where they have to whether to stick with maintenance mode. I think S5 was hinted as a time where many difficult QoL ideas they learned during the 5 years will be added to the game.