101.9 KWNW (iHeart) goes from Top 40 to Classic Rock (8,500 watts)
While the new "Rock 102" is 8,500 watts, it's at, or near, the maximum height for a Class C3 station. So, it's roughly the equivalent of 25,000 watts. It's a substantial downgrade from what it had at 102.7, but it's not nearly as bad as the impression just looking at the ERP gives. Also, keep in mind that, while 100,000 watts, 102.7 is a Class C1, which means it's limited by height. With the exceptions of 99.7 and 105.9, all of the 100,000 watt commercial FM's in the Memphis market would seem to be Class C1's. WGKX was downgraded to a C0 shortly after that class was introduced because it wasn't at the minimum height for a Class C FM (but was 100,000 watts and above maximum for a C1) when another station wanted to upgrade. Can't remember which station that was, though.
99.7 WMC-FM (Audacy) goes from Hot AC to Country (300,000 watts horizontal, 100,000 watts vertical - can someone explain this horizontal/vertical difference to me?)
I'm not an engineer (and if one reads this, (s)he could explain better than I could), but my understanding is that horizontal overcomes buildings and other obstacles, including potential interference from other signals and man-made interference, while vertical lessens interference to other stations. I also understand vertical power helps reception on most car radios and home stereos that use dipole antennas. Seems like I remember AM typically is vertical while FM is usually circular in antenna polarization. A handful of noncommercial FM's at least used to operate with solely vertically polarized antennas, but, last I'd heard, that wasn't permitted in the commercial FM band.
94.9 WKVF (EMF) goes from K-Love to Air1 (2,900 watts)
94.1 WLFP (Audacy) goes from Country to K-Love (50,000 watts)
I don't know if that has been announced yet, though it likely has been decided. 94.1 and 94.9 have similar signal contours despite the difference in power. WLFP, despite being a Class C2, is directional and doesn't go very far to the west to minimize interference to KKPT 94.1 in Little Rock. That has never been that great of a signal, which is probably one of the reasons Audacy was willing to part with it, though the current signal is a lot better than what it was at 94.3.