There is no change in latency between FIR Compiler v7.2 and versions 6.0 through 7.0.
The latency of FIR Compiler v7.2 is different compared to v5.0 The update process cannot account for this and guarantee equivalent performance.
When in Blocking Mode ( m_data_tready in use), the latency of the core is variable, so only the minimum possible latency can be determined. When in Non-Blocking Mode (no m_data_tready ), the latency of the core might only be slightly greater than that for the equivalent configuration of v5.0. See the latency information in the Vivado IDE Summary page.