Can you please learn to read? I never said it's unusable in 2v2. There are situations where calling in a JT can be ok but in 95% of games it's not worth it. If you think that makes the unit balanced, then ok. Up to you.
Regarding the dominance of JTs that you claim: I can not remember having seen even ONE dominating JT since the big heavy TD nerf (mainly 300 damage per shot reduction). And that is in hundreds of 2v2s that I played around rank 50-150. Not one. Elefant and ISU dominate many 2v2s and are used frequently.
Unless you want to meme you will always go for Tiger or even KT over JT. A combination of KT/Tiger+JP4+Stuka works well in late-game 2v2 meanwhile JT+P4+Stuka doesn't. As Ost you can use the Brummbär as an AI tank and keep the Ele behind it to protect it but OKW P4 can't fulfil that role.
I'm reading in between the lines
You said it would lose in a scenario that it should lose in and say that's a problem. Vetted enemy TDs plinking away at it should be threatening. If you feel the lineup supporting the JT is problematic why are you arguing about it losing while unsupported to units the support you are saying make the JT weak wouldn't do dick all against?
The JT is great in lane maps, as it always has SUPPORTING and being SUPPORTED. It's guaranteed to pen and hits like a truck. It can barrage weapon teams (I do think that needs a sizeable price decrease though) it makes it so enemy TDs can't just plink away at your other armour or your team mates armour and that's a big deal. Additionally the JT is competing with a number of GREAT exclusive vehicles, the KT, the command panther, the tiger and its even competing with a trash one - the sturmtiger. So it sometimes comes down to supporting army. The new tiger commander is one of the strongest commanders okw has knocking out most of their factional weaknesses--late snare, lack of recon, weak hand AT, lack of smoke, lack of off map AND you get a fucking tiger tank too! It's necessarily the unit is bad as there is a better commander.
I don't think it should have lost its range advantage over the elefant, it was seldom seen then and, even though the last game I played there was one, I don't expect it to be seen often still. As long as you can get fussies in the fantastic new commander that has everything I don't suppose anyone is going to pick fussies in a worse commander. Simple as that really.