There are nods and ties with WoW but you won't be lost because of that. You will be lost because, the Warcraft Movie starts sequentially literally from the beginning (Warcraft 1 and 2, but mostly 1). You will recognize some key figures, but the storytelling is a bit rushed so if you have no...
All for the mix-up personally - even if the result is some items end up being generally more rare, a balancing of drops across various IDs just makes sense.
A simple god/arm will make you not have complete utter garbage ata early on honestly. The jump to Ult will be where you might need s-parts and/or smartlink (though I suppose if you can afford/have it, go for it).
Also, curiously the DFP value is ABOVE what is said to be possible on PSO-W. First time I've seen something like this. What's up with that? The range is said to be 96 - 111, but this has a total DFP of 133 (or +37 DFP from min). EVP is 249 (+14 from min), which is within the ranges listed...