Coming from this guy, I am glad the towers will make their return. However, when it comes to PVP, I will have to agree with everyone else that it's non-existent; for it to be true Player vs Player (PVP), both players must engage each other in real time. Neighborhood battles have given a semi-definition of such for it affords the opportunity for the player to selectively attack an opponent and that opponent a chance to retaliate (if they choose) within a 24 hour window. The PVE Arena (sorry, but if I am battling bots, then having players attack me without a way to strike right back, then it's pretty much a player vs environment kind of game). Even if we are grouped by points when we go up the ladder, we still won't get that player that attacked us. More so, there is no replay to show us what was used against our defense to help us improve on it. Neighborhood battles provided all that, and it's up to us if we wanted to make changes to the lineup; when I had those fun PVP battles, I use this to help me to spice up my defenses that sometimes would send the attacker running away until next time.
My defense for the PVP Towers was solely for the new players whereas the other aspects of the supposed PVP are out of reach (unless they rushed through the ages to get there). While the towers do give out a small amount of medals for placing, this will help them with their early expansions as they play. This was something I did when I first played FoE. Since then, I had always used the rankings in towers to compare my progress along with neighbors. Fluff points (you know, the GBs at level 80 give out millions in ranking points) is not something I used to gauge an opponent; however, I do look into their city to find key buildings to estimate a defense percentage and see if it's possible to attack; second, is pretty much seeing what units they are using for defense. I use the Towers to see how active a player is. Fighters will be active while farmers are at a 50/50 chance.
To a player that has gotten their last expansion at 1.1 million medals, medals are useless to them. Myself, I am working at unlocking the 460k expansion. Thankfully, I got an Arc to level 29 (still building it) that would help me get said medals (I am in no rush) to keep unlocking, so they are still useful to me. A new player with 0 ways of getting medals will be stuck, frustrated, and will throw the game onto the shelf to go play another.