@Lionheart, dang dude that stat line. I'd definitely tone it down a few notches. It's worth comparing a servant to where others lay in terms of stats when you're making them. For example, Berserker Herakles, a being who is said to have lifted the sky, 'only' has A+ strength with what is a 'perfect' master and the Mad Enchantment. Is there really enough to warrant him having what could be seen as 2 potential boosts which make him stronger, more durable (not counting God Hand) and just as fast as the son of Zeus?

Compared to other Saber classes, specifically Arturia, his stats also do not line up. At a base level, not counting haxcalibur, he is more powerful than Arturia, who for obvious reasons is probably the max of what you can expect from an English king other than maybe William the Conqueror. If I were to restat him it'd be something like:
Str: B
End: B
Agility: C
Mana: C 

When I read and think of Richard the Lionheart, it's not exactly the physical powerhouse you've depicted him as, but rather an adventurous (and poor) king who was a notable Crusader and a decent warrior. The integration and recognition of Gaillard is good, but more can be done with it conceptually than just making it a zone where he fights better. Re purpose it for the defensive, possibly, and consider implementing something like...

[i]Durnstein & Trifels ~ Under the Authority of Him
Rank: D etc etc

Richard the Lionheart was, for a time, imprisoned in Austria, resulting in the equivalent of a PR fiasco for the Byzantine Empire. When eventually brought to the Pope and after a remark regarding deference to him, Richard responded: 

"I am born of a rank which recognises no superior but God"

Richard can be held by none who are not the Lord himself. When activating Durnstein, the Lionheart becomes unstoppable by any means that are not extremely powerful restraining NPs, breaking free of any restraints on his movement and disregarding any penalties/debuffs for its durations, allowing him free movement.[/i]

Combine that with a defensive Noble Phantasm you could make out of Gaillard and instead of this stat-jockey, you get a progressive tank; a hero who keeps on going and can take hits but is not an absolute destroyer like Berserker while maintaining the idea that stats=representative of legend and class combined. In exchange for a relatively weak stat side for a Saber, you can make one of his Noble Phantasm's exceptionally powerful - a trump card which could toss things on its head. Considering Richard didn't exactly have that much of an outstanding legend in comparison to the likes of Arturia, Berserker, Seigfried, Mordred etc it'd be worth making him more Noble Phantasm based rather than stat/skill. Unfortunately, while Saber is technically the physically strongest class, it does not necessarily mean it is the strongest within an individual war and still depends upon who was summoned.