Junks are good but have got a few bans
All Stars have got an amazing 3* half deck Robb Cr Saki Randy and Nathan if you like leaves room for 3 3* and 1 4*
Sahkrohm also have an ok half deck with Murray Ngrath Corrina and Anakrohm or Jautya

All of them. Seriously.

Most clans have gotten a lot more well-rounded, and every single clan can at least make an amazing half-deck.

I think Berzerk and La Junta are the hardest clans to play right now.

Yea, almost every single clan can make a great half deck at the least.

Bezerk are really weak w/o any great potential halves w/o Spyke.
All Stars are quite solid w/ Saki Robb Cr Randy/Jessie Nathan/Marina
Piranas are still quite solid in mono even w/o Ulrich (can splash Spaghia)

I still find all the clans are good in ELO if you know how to use them.

Roots/Junkz is the most painful split to face...very defensive and annoying

Pack a Stop card or two. There are some very solid ones out there.

Yeah yeah, "all clans are good, you just need to learn how to use them etc etc etc...", but seriously:

Ulu Watu still sucks.
Berzerk is completely useless without Spyke
La Junta continues to be a specialty clan you see once in a blue moon
Frozn is also useless without Kalindra

There's a reason some clans are more popular than others