Oh, really? How was Malva? :P
But that said, on one hand I did like their personalities. On the other hand, as far as gameplay goes I too found them rather underwhelming, except for Siebold. For one they only have four Pokémon, when i'm sure they easily could have had five or even full teams of six given the massive Kalos Pokédex. And I do get that they'd want to make their aces Kalos Pokémon, although some of their Pokémon are questionable. And it doesn't help that their teams don't change in the post-game, that was a letdown too.
Malva has Pyroar, which is fast and can use Noble Roar, which admittedly can cripple. Chandelure is also decent too so that was a good one for her. Of all of them, the oddest one is Torkoal, which does have huge Defense but the Special isn't too spectacular. It uses Curse, but I guess it's sufficient.
For Wikstrom, admittedly Scizor is good, and Aegislash can be tricky to get past, and Klefki can be a jerk with Torment and Spikes. But Probopass wasn't too good a choice i'd say; Magnezone would definitely be better on that note.
I do like Druddigon, but Drasna's had a crappy moveset (two Normal moves? Why not something better). They could've gone the Sheer Force route like Iris', and they really should've gave her a pseudo-legendary like Garchomp or Hydreigon instead of Altaria, especially considering you just battled one against Serena/Calem in Victory Road.
Lastly, Siebold, who as I said I find the best of them by far. Clawitzer hits hard with Mega Launcher boosted attacks, and Starmie is fast and can use Light Screen. Barbaracle is a strong physical attacker with Tough Claws to boost all its attacks except Stone Edge. But his Gyarados is scary since it can use Dragon Dance. It's never screwed me over per se but i've gotten quite lucky against it.
However, I did enjoy battling them if only for their awesome battle backgrounds. In my Wedlocke, Wikstrom turned out to be the hardest because his Klefki used Torment on my Durant and that led to it being wasted against his Aegislash. =( My Lanturn with Stockpile came to the rescue, though. Siebold was a bit scary too, but Stockpile came in handy against him.
Also, fun fact. All the Kalos Elite Four members use aces of previous generation Gym Leaders/Elite Four alongside their Kalos Pokémon:
Malva uses Flannery's ace (Torkoal) and Shauntal's (Chandelure).
Wikstrom uses Bugsy's ace (Scizor) and Roxanne's (Probopass). Yes, they don't technically use those in the initial battles, but they use them in the PWT, and Bugsy has a Scizor in the rematches in HGSS so I'm counting it.
Drasna uses Winona's ace (Altaria), and Druddigon, which while not the ace of any important battles, was used by both Alder and Iris (Gen V's Champions), and Drayden.
Siebold uses Misty's ace (Starmie), and Gyarados, which while not the ace of any Gym Leader or Elite Four, was used by three previous Champions (your rival in Kanto, Lance and Wallace) and Gym Leaders (Crasher Wake, Clair and Blue).
