no problem and youre right about what you said in normal circumstances (i,.e having to play part 1 would have been reviewing BOTH game instead of one), except with the case of WKC2 its more of an expansion pack to part 1 than a sequel, infact part 2 consist entirely of going through all the levels (same layout in everything) you did in part 1 but in the reverse order with only 4 new areas added (3 of which are at the end and 1 at the begining) and 1 new town. So for a TRUE sequel thats pretty pathetic.
But the fact of the matter is WKC1 and 2 were originally supposed to be one game but due to time they split it in two and released what they had... so technically with WKC2 youre playing disc 2 of one "2 disc game" instead of a sequel, which explains why a save file from 1 was requirement in japan to play 2 and which 2 had no tutorial or story recap.. i mean if yo play a multiple disc game they dont recap or give a new tutorial at each new disc right? just think of it that way :p
But as for the review score itself I love the game but wouldnt give it more than a 60-70 myself, but considering theres no real MMORPGs or monster hunter/phantasy star online type game son the PS3... WKC2 sis your only choice at the moment if thats the kinda fix/game you want... and right now that the price has dropped to a mere 20 bucks, its WELL worth the investment (back when it was 60 id definitely say rent first.. but 20? I say go ahead and get it lol)