My thoughts so far:
I'll Stay With You - Probably one of the best songs from the WFTSC/LS bunch. Could've been interesting to see it live (with Hooky).
Sugarcane - I can see this one getting a lot of heat from most here, but I like this one a lot too, even if it's not what one would expect from New Order. Lyrics are a mess and lacks a bassline, though.
Recoil - Some nice bits with the bass, but overall it's a mediocre modern NO song. Just another "Run Wild", except less catchy.
Californian Grass - This one has Such-A-Good-Thing-level lyrics
Still, I liked Barney singing in a lower key and I think I'd place this in a "Best Sirens".
Hellbent - Much much worse than the Total mix, which I'm quite fond of. The difference between the mixes shows how crude most of these songs are and how much they could be improved.
Shake It Up - This is bad even for Electronic. Hooky's lines save it from being 100% garbage.
I've Got A Feeling - Very beautiful tune, but also very different for NO in some ways. Hooky doesn't sound like he's using a pick during the low key bass parts; the guitar has a different feel to it as well. Reminds me of Sabotage.
I Told You So - The original was bad enough, but this is terrible. I'll skip to the first track every time I listen to Lost Sirens. Really don't know what it is that people like in it.