Wow, I have more WD stuff than I even realized... I checked their release list on Wiki, and the only ones I'm missing are Cadash, Parasol Stars, Sega Ages, RayStorm, and RayCrisis.
It would be fun to go ahead and complete the collection, but it looks like Sega Ages is kind of on the expensive side, so I dunno. Also, I'm 99% sure I've owned both of the two "Ray" games at some point in the past... I must have sold or traded them ages ago.
I've always had a soft spot for WD's releases, in spite of some of the weird unnecessary changes they often made (like the ammo/spirit system in Silhouette Mirage, or having to spend magic experience points to save your game in Lunar 2).
On the topic of Exile 2, I actually kind of enjoyed the increased difficulty... it was a nice change from the cakewalk that was Exile 1. To be honest, I didn't really think Exile 2 was all that hard until the very last section, which was pure evil. But even that part became relatively easy with a little trial and error and memorization. Ironically, the very last boss in the game was stupid easy for some reason.