This would be so great, everyone could merit everything to a super race level of stats too - you could have the HP and VIT of a Galka, the MP and INT of a Tarutaru, the STR/MND of an Elvaan, the DEX/AGI of a Mithra, and the CHR of a Hume. My only caveat would be that this should be a separate and new merit category from everything else.
And for game logic, here's this - you'd need to have beat CoP (and of course unlocked merits) to unlock these new merits, since you've "broken" your chains - the primary game logic for race differences if you will. There could even be a quest for it, and if it really kills people that hate Tarutaru or obsess about a game needing to be weighed down with morals and life lessons (aside from the standard "don't be a jerk" that happens when you play with other people), the quest or meriting could be harder for Tarutaru like everything else is in the game.
Flatlining the stats in this way, by bringing it to everyone's strengths, and by having a bit of game logic, will make the design easier to deal with since the devs won't have to worry about making another set of RSE at 99 that somehow is competitive with the wholly better gear we have now, nor will they have to worry about shutting out Tarutaru from entire events by making mobs hit too hard, nor have to worry about making Tarutaru actually have any amount of advantage to balance out the biggest disadvantage ever by making MP pools worthwhile or INT based magic damage competitive (although they should do this regardless) with melee jobs.
But I guess if making things even between races is so unpopular we can remove the quest and key items to open those weighted doors in Quicksand Caves, and start working on more ways to make life worse for anyone who isn't the Galka masterrace.