Hi Cough,
By using GsMini for the approach, you may make life slightly more difficult for yourself as your trimmed speed will be constantly changing...Just at the point that you have lost auto trim...
Then it will handle just like a Boeing.
Without the use of ground speed min - the IAS will vary during the gusts, requiring you to change the power and chase the speed.
I agree you must select speed during reconfiguration because the system would be working to the wrong speed schedule. However, once in landing config and with the appropriate VAPP inserted, what's the technical reason I can't take advantage of GS mini protection by using managed speed?