The fanservice is good in both shows, no doubt about that.
The main problem for TLR is that Lala as a character is truly unnerving. Is a hit or miss for her, and if it's miss, the rest of the show would only depend on Haruna, Mikan and the rest of the secondary girls, who up to now have barely more screening than the annoying alien whore. And Rito is a total loser. That's weak.
Kanokon had both lead girls in the same tier, without gaining much advantage over the other. And Kouta had shown normal male wants over both girls (aka: banging them)