To be fair though, there have been a couple of Shining SRPGs over the years like Ark and Feather.
It's just that A) the game systems used for Shining games are all over the goddamn place (the that currently on its way out is a goddamn 2D fighting game for Christ's sake), and B) I can't help but feel that said game systems are merely smokescreens for the Dating Sim/Harem Adventure hiding at the game's core given the Hentai-like character designs.