I'm an altaholic too and while I could see some of the benefits of allowing Ishgard to be unlocked, say server-wide, my non-50 alts really have no business being in Ishgard. They'd be as useless as Tataru. They'd be homess (no inn access yet), unable to find any meaningful work (no quest access), and about the ONLY thing they could do would be to unlock the new jobs there. For which, you actually do still need a level 50.

The MSQ once you hit 50 can be ground out in a weekend if you know what you're doing, so to be honest I'm not sure I see the benefit of it unless they lower the requirements for the new jobs to 30 - which they won't.