If i'm not mistaken, i tried setting ext. sd as my primary (default) download destination before. I did root the old SGS1 prior to that but can't say i struggled much in achieving that. On my Xperia though.. It's also rooted but as hard as i'm trying, nothing seems to work. Otherwise pretty neat device with an unnecessary fault. Sony, wtf??
As far as doing manual relocations of apps, games, etc goes.. I get that some of these simply cannot be located on anything but internal storage, but i still think the afore mentioned decision to make the setting for the majority of such software should ultimately be made by me, as a customer/user. Again, wtf??
Lecturing isn't my cup of tea but it is banal enough to really suck.
Will post a solution if i find one.