The first thing I can retort with it comes to powers is the when they were turned into kids. If that is what they can do without trying, then it goes to show that the teenaged versions may be holding back their strength. And I don't think counting out "one instance" on the PPGZ side just because they didn't do it again (they technically did, Kaoru blew up a distant moon with her eye lasers by mistake, which at first shot straight through the Earth within seconds), when the PPG themselves only went as fast to break the time barrier once (twice going back without even going the same distance the first time), and never have done so the same way again.
I'd argue less abilities on the stance the PPGZ didn't go through as much shit as the PPG did, time in Z did seem to go at a slower pace, despite this they vastly improved themselves with powers by the end of the series, primarily when they had to go through time with their Puff Mech.
I will concede with Teamwork, I agree. However, again by the end of the series, it seemed they started improving upon that, although comparing Blossom with her Japanese counterpart Momoko, the two clearly show a different level of "leadership" and the latter is justified being laughed at when she assert herself as leader. (In a way it's like Sailor Moon with that.)
I still think they are at least on par with the original PPG, they just don't have any real moments when they have to project their full potential, compared to the originals. This is something that I feel is the root of the problem for many people that dislikes Z, it's missing a big piece of the puzzle that makes PPG work in general, the combat. With a name like PPGZ in itself, if it just parodied DBZ a bit more to combat the original's "fighting spirit", the show would have been at it's fullest potential and could really show how good the Z PPG are.