If you happened to reset the transmission adaptation values, here's detailed information on what to expect (sounds like the poor shift quality you're experiencing) and the relearn procedures for fixing the poor shift quality.

https://www.fcpeuro.com/blog/how-to-...daptations-zf6

Relearn procedure:
https://s3.amazonaws.com/fcp-creativ...Software+N.png

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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M.