The base issue with your entire argument is the assumption that the race would be sexualized on anywhere near the level of Elin. The Elin are so blatantly and hilariously sexualized that it's pretty much impossible for SE to get anywhere near that with the current glamour options in-game.
Pretty much the entirety of the Elin wardrobe consists of clothing designed specifically to maximize panty shots, in addition to them having those enormous hips and thighs (seriously, what's up with that?). Not only that, TERA is chock-full of tons and tons and tons of sexualized clothing and armor designs for the females of all the races, which itself invites a certain level of "creep-factor" in the player base. FFXIV does not have this issue. The absolute worst outfits are the Dzemael Darkhold outfits (the galerus set and the taffeta set, as mentioned), and those are actually surprisingly tame compared to some Elin outfits (some of which even have butt-riding thongs *shudder*). The grand majority of armor and clothing is practical or at least wearable compared to the crap you get in TERA.
Also, yes, I am not really talking about or encouraging the OP's use of "loliqo'te" or their desire specifically for younger versions of existing races. All I care about is a certain aesthetic, and I don't care how they get there.
Now, let's get back to one thing you're doing that is moronic: pedophilia is impossible to encourage. People are either born with the condition or not, and literally everyone with a functioning conscience knows it's bad. I mean, it's only beaten into your head about a million times from the time you're born. Adding a cute race doesn't somehow magically encourage people to become pedophiles or for pedophiles to become child molesters or for pedophiles to start evangelizing the wonders of the childlike figure to the world. Either you're born with the condition or not. Either you're born with the psychopathy gene or not. Either you're born with strong impulse-control or not. For the most part, anyone who does these idiotic things is not going to be influenced by media whatsoever, and there is zero evidence that media can make those traits worse (if anything, with Japan having such insanely low crime rates, it's just the opposite).
I get that child-molestation is a terrible crime and has terrible consequences for the child, and obviously you don't want to encourage that. Letting people play as children, or child-like cute races for that matter, hardly does anything resembling that. Again, the nature of that affliction is one such that you can't really "encourage" people who have it simply because it has such an insanely strong social stigma attached to it such that no one will ever want to be called one, let alone engage in behavior that 'outs' them publicly. The only ones you have to worry about are the ones with a combination of a. strong libido, b. no-to-few healthy outlets for said libido, c. ready access to children (relatives being a big one here), and d. weak impulse control, with e. low empathy being an exacerbating factor. Odds are very high you will NEVER meet someone with all these factors at once on the Internet playing an MMORPG like Final Fantasy XIV, mostly because they have access to the internet and thus factor b is a non-issue (and yes, I'm serious here - check crime rates from the time the Internet became a thing if you don't believe me).
So for the most part, all you really have to worry about are creeps. Not pedophiles being somehow 'encouraged' by the inclusion of a cute race that has appeal well beyond pedophiles themselves, just weirdos who love to get a rise out of you (and likely already play Lalafell anyway specifically for that reason).
Meanwhile, the rest of us just want to play something cute that isn't a potato. Done and done.