What is the relationship to a bari chord in terms of I, IV, V ? It's a fifth lower tuned....
I'm not sure I understand the question correctly, but a normally-tuned baritone uke (DGBE) has the same fingering for the same chords on a guitar (top 4 strings of course).
I have a Rogue Baritone also, and about the same thoughts as you do...a very unexciting instrument that just feels and sounds too 'thick'. I might suggest looking up "Gambler's special" here in the forum or on ebay...There are some very decent Lanikai baritones you can get for about the price of the Rogue; it is a gamble, but nearly all seem to be fine, and they're much better than the Rogue.
I pretty much neglect my baritones, and this thread had me swapping some string configurations today. I tried one with normal uke tuning, both high and low G, and was unimpressed. It did sound more like a uke, but I kept thinking "why?". They're big, sound boxier than tenor/concert, and while I like the fingering room on a tenor, the baritones have too much room for my taste.
So I went back to DGBE, one with re-entrant and one not, and after all of that, I think I prefer the traditional baritone, 'sounds like a guitar', tuning, with wound strings. I tried some Aquila red low strings but was unimpressed, and they buzzed at times because they do flop around a bit. I'm not positive, as the high D tuning does sound a bit more 'uke-y', and it enables you to jam nicely in E with guitars, and not sound like just another guitar in the mix. (the only real use I have for the baritone is for jamming in E with guitars, as it's not a 'fun' key for ukes, as it is for guitar).
So after all the string swapping, I'm basically back to thinking I'm just not much of a baritone fan...they do sound nice, but when a classical guitar, with two more bass strings and closer string spacing is at arm's reach, it's hard to want to grab the baritone uke instead. And when I want the uke sound, the baritone just sounds "big", even with re-entrant tuning. (note: I'm not knocking the baritone in any way, it's just not a big favorite for me).