Unsure when this happened (maybe with the new store? Or maybe it's a sale and the new store isn't very good at communicating it?) but the game is now £9.99, rather than the usual £27.99.
Wanted to try this out after getting a Vita months ago, as the original is one of my favorite games, but didn't want to gamble on being disappointed for that much money.
While being a little late to the party, I'm happy to report the game is great. The characters are a little less endearing (I'm about 10 hours in) and it loses some of it's grandiose nature in the move to a hand held, but all the combat hooks have survived relatively intact, and the new customization options make for some interesting squad combinations.
Now if I can just convince enough people to buy it, maybe Sega will localize the 3rd game...