I agree that watching the first season of Queen's Blade may not be of much help while considering watching season 2; however, it is actually much better than one may have expected! Granted, there are LOTS and LOTS of fanservice (weird camera angles, jumping breasts, ripped clothes and suggestive poses), but if you don't mind fanservice (or if you even embrace it!) and give season 2 a chance, you'll see there are a lot of things that makes it worth to watch.
The story continues right where it was left on season 1 and the Queen's Blade tournament finally gets to its final stages. There are many characters with their backstories being told or expanded. Also, there are many cool matches during the tournament and Aldra's (the current Queen) role makes the whole thing much more interesting. The overall atmosphere in this season feels much more medieval and fitting to the tone the show wants to set. It is worth to mention that Reina's character improves A LOT! I point this out since I believe she was one of the main reasons why I couldn't completely enjoy season 1, but after watching season 2, it all makes sense.
I don't wanna give any specific spoilers, so I will just say you shouldn't expect characters to be as shallow as in the first season since everyone has a role to play in the plot. So just give it a try and hopefully you'll love this season as much as I do!