I'd much rather they just geared heavy to work according to ilvl. I'm sure a fresh 50 walking through the beastmen strongholds is still relatively vulnerable to heavy and possibly dying to a group of enemies. I like the idea as it discourages low levels running through the entire world map on their chocobo because beastmen can't keep up with them. But when you run through an area as a i90 where the enemies (lv 41 in particular) can barely even break 3 figure damage totals and you regen for more than they can hit, heavy has absolutely no point as it doesn't hinder you in anyway other than the irritation of taking longer to get where you want. If that is the case just make it so mounts can't enter beastmen strongholds and the like.