Synrec has been working on a tactics system a lot, but I like your idea of using action sequences and Animated SV battlers. Can there be a way to have both?
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FinalBossBlues (Time Elements) and Seliel the Shaper (Mana Seed) both offer multi-directional charsets that include attacks now, which might be intended to be for action RPGs. Time Fantasy already had walking graphics for SV battlers as well.
I am considering starting a tactical RPG project soon, but the difficulty of using the attack graphics during tactical battle is frustrating.