Gertjan isn't that good.
Roots have enough bans as it is. Do you have to build your deck with a counter for her (or multiple counters?). I personally don't. So it's not so OP it deserves a ban.
Roots in general aren't that good it's only thier bonus that makes them playable.
If you look at each of the card in the star groups they're at the bottom of the quality and depth lists.
2*
Treeman and
Flora are the only good ones. Most other clans have at least 2 usable ones which are better.
3* Are ok but not amazing. Take out
Gertjan and your choices are terrible for mon .
4* Only 2 viable cards. Both of which people vote to ban. ( I wouldn't play
Burdock)
5* Possibly the worst 5*
elo clan in the game.
So the cards themselves aren't OP, it would be arguably their bonus. But you can't ban the entire clan. No matter how hard Ur try ( 6 bans and counting.)
If you remove
Gertjan, you destroy and entire deck type (Mono
Roots).
All the good 2* cards are gone
Gil,
Bonnie Ld cards that actually influenced the game. I miss those days.
On
Ditha. If you choose to play her then obviously one of the dangers is SOA. If you don't like SOA play
Lena or
Selina.
What i'm saying is that a good player won't let
Ditha be played against an SOA card. What a good player will do is out think their opponent. If think your opponent will pill to stop you using
Ditha, don't play her. Pick your rounds. Winning every round is nice but it doesn't happen often,.