In a post below, I raised some questions on humidity control, and one option was for slowing the blower speed and adding a TXV device. I'm starting a new post to focus on the TXV device.
I discussed the problem with the installer today, and he was in favor of lowering the blower speed, but was unsure of the benefits of the TXV.
My understanding is that by regulating superheat, one effect of the TXV is that the coil cools down faster and humidity removal starts earlier in the cycle. Are there other benefits of the TXV in regards to dehumidification.
Also the installer said that the indoor coil is 0.5 tons larger. In my mind a TXV should help this situation even more. Would downsizing the indoor coil also help.