And in M43 this would be a F2-F3.5... I would say don't look at the numbers or look well at the numbers .
In MFT that would be more an F4.0 or even a F4.5 at the longest end (200mm).
But nevertheless, this is a very good point. The MFT Olympus Zoom 12-200/4.0 was raved in the forums and it has a fixed aperture of F4.0 only in the whole zoom range. Nobody complained about the slow aperture back then (in fullframe around F6.3), although the price tag of 1.300€ was very steep