i agree, a stable yet high ph is better than you mucking with the levels and potentially spelling disaster for your tank. use a longer acclimation process (drip acclimation) so that the new fish are not shocked going into the higher/different ph level in the tank.
Whilst really huge swings are to be avoided (I'm talking 8.5 to 7 and back up again in a few hours) pH stability is really not that important. Fish don't care. Fish are not shocked by pH changes but rather by changes in TDS. If the local water has a very high pH it's likely that new fish will come from similar water anyway.
I don't know how that "stable pH" and "pH shock" myths carry on in the face of the fact that planted tanks may vary by a whole pH point over 12 hours as CO2 levels change.
I always think that acclimation issues need to be considered in the light of the way that fisheries introduce new fish to a stretch of water. They bring them along in a big barrel and pour them in.