[@Yuri]: I don't think we have anyone as poor as Shirou in terms of magical capabilities as a Master. But if we did it'd be a nerf for the Servant.

[@Medjedovic]: We might if this one's accepted.

If he's that poor in terms as a magus, with no inborn magical capabilities, could he still summon a Servant? Even Ryuunosuke had magic circuits, he just didn't know about them.

If he does have them but he just can't do most magecraft that's a different matter.

The matter after that is if he'd be as bad as Shirou.