im sorry but the elephant alone is a huge problem already in 4v4 teamgames... JT/ISU/ELE are all huge problems in 4v4s...
and what do you suppose to replace this ability with? you cant nerf a non OP unit without giving it a replacement...
im sorry but the panther is very very powerful as it is 2v2 and below... things are different for 4v4s yes but 4v4 itself needs alot of work...
I think issue with long range tds in 4v4 comes more of an issue with maps being chokepoint lanes (cough port of hamburg cough) where their one of major flaws of being vulnerable to flank is made useless as enclosed nagure makes it hard to get to it without getting shot and struck to mines all the way. Effectively only way to desl with those scenarios is just mad bombrush if ele is in any way bad location or try to arty it.