I'm a little behind on the Remaster, haven't tried it out fully. The usual flaw of dual-wielding is that its a hardwired stance, all offense and minimal defense (no shield, minimal armor to maintain mobility; glass cannon). My issue was that Rhea was all that and slow AF besides! She needs quickness, even at the expense of everything else. Active weapon blocks could stop incoming direct weapon shots at her, but be useless against magic, physical area attacks (grenades or grenade-like objects), or flail attacks that could "wrap around" a blade but impact flat against a shield. She could take a damage (strength-based) penalty for single-handing long swords, maybe deliver 75% of what someone else (Sarah or Ralph) could per hit with the same weapon (for a 150% max damage) because they commit and follow through with their strikes whereas she pulls away quicker to stay in the "flow". OR instead of longswords, have the Tenta use shorter swords, like the classic poignard, or something like Rikku's "comet" scimitars in FFX, which also does less damage than longswords.