If you loved Broken Blade: Scars from an Assassin's Blade, try Mobile Suit SD Gundam Mk IV
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Broken Blade: Scars from an Assassin's Blade
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Mobile Suit SD Gundam Mk IV
What they share
Both films are directed by Tetsuro Amino, and they sit in Action / Animation territory. If that's the register that drew you to Broken Blade: Scars from an Assassin's Blade, the second film will land in a comparable space — through a different lens.
What Mobile Suit SD Gundam Mk IV is
It seems someone shrunk the mechs. The SD Gundams compete in a race. Because small robots need vacations too.