A 2.5 version of GLBenchmark, which should be all new content, is on its way to lift the cap.
I imagine it'll fall closer to the complexity of the proposed 3.0 version than the 2.0 release... perhaps Kishonti will add more to GLBenchmark 3.0 now before release.
The funny thing is that there's an IMG announcement about it, yet nothing on Kishonti's website