The lateral response of segmented cross-laminated timber (CLT) shear walls with openings is commonly interpreted through global strength and displacement capacity, whereas the more consequential design question is often local: how floor, lintel, and parapet continuity reroutes forces across coupled walls, alters the intended sequence of connector yielding, and shifts the wall mechanism from rocking toward sliding. This study addresses that question through a mechanism-oriented reanalysis of a previously validated numerical database for one-story multi-panel segmented CLT shear walls. The analyzed wall family comprises three wall geometries, two panel aspect ratios, four structural-interaction idealizations, three floor-panel thicknesses, and three wall-to-floor self-tapping screw (STS) spacings. All derived indices were recomputed directly from the reported wall-level capacities, and the summary PNG figures were regenerated from the verified numerical arrays to ensure consistency among text, tables, and graphics. Using the coupled-wall force–displacement responses and panelwise displacement decompositions, three diagnostic indices are applied: a strength amplification ratio, a deformation-retention ratio, and an interaction severity index. The reanalysis shows that floor interaction alone increases strength while largely preserving deformation capacity, but continuity through lintels and parapets produces a markedly different regime characterized by larger strength gains, reduced deformation capacity, earlier STS and bracket participation, stronger right-side force concentration, and local hierarchy inversion in moderate-aspect-ratio wall lines. High-aspect-ratio panels remain more deformation-tolerant and preserve the spline-before-hold-down hierarchy more reliably, although they can still exhibit localized reverse sliding in the first coupled wall when parapet gaps open. Floor-panel bending stiffness has a negligible global effect within the analyzed range, whereas the vertical stiffness of wall-to-floor STS connections is a dominant moderator of both strength gain and deformation penalty. The contribution is therefore a reproducible interaction-focused synthesis, bounded to monotonic envelope response, that clarifies when whole-wall strength gains are accompanied by non-uniform connector demand, hierarchy inversion, and opening-adjacent floor demand concentrations.