No, there was a boss (and I found it to be a very good fight) but no random encounters.
Also, in the Gelnika... is it just me, or are the Unknowns back to front? I remember Unknown 3 always being the hardest and Unknown 1 the easiest. On this, it's the other way around.
EDIT: Still can't beat the f*cking Mime boss. The HP<-->MP one was a very nice fight though, and in fact, I might actually see potential use for HP<-->MP against the Mime one.
... That f*cking Silver Dance attack is also %-based? Dude... I honestly can't see any way of beating these guys, short of powerlevelling and brute forcing them down... and I don't even know how well THAT would work. The one at a time are fine, but when there's four of them at once, potentially capable of taking out two characters and leaving the last one at 1 HP within one "round", with all their attacks being %-based meaning that no amount of raising your HP works (indeed, I dropped the HP Pluses for this fight to make healing more economical)... What am I missing? I did click to Susano'o being Wind-elemental, but that's still only a minor help...
The KOTR boss is also somewhat overkill, but at least in this case it's somewhat justified by what its guarding. Was a bit surprised to see Gravity absorbed after the other materia cave enemies being vunerable... but my biggest annoyance is how he can heal far quicker than you can dish it out. I'm guessing Shadow Flare is a must for this one? (I didn't bother to get it from the Quadra Magic boss... guess I'm waiting for Ultimate Weapon now.)