This heavy status while on mount...

[Felis]

The fact that a mob can still agro when your 30+ ilvls above it is also dumb.

The ilevel is irrelevant. Only the class/job level decide if an aggro enemy attack you. Or give the enemies also better gears with higher ilevel.

Example:
you see a level 50 enemy with ilevel 60. Thanks to your gear you can pass him, but behind him is another lv 50 enemy with gear that look like ilevel 125.

It's a mechanic lazily copied from WoW, designed to give the player a sense of danger when traveling past high level mobs. I've never once died to it, so chalk another one up to "we copied WoW because of sub numbers".

During 1.x enough players died because of it. All what ARR need are enemies 10-20 levels over the max. level cap and with ranged attacks (but only attack if you run instead to walk).