Given the conditions you've specified, nothing is wrong with cookie cutter frames. One reason people critique such frames is quality control, another major one (in the road-bike world) is that such frames are designed around a racing model even though most people riding them won't be racing and don't need that sort of fit.
Another issue is number of available sizes. Frames with more incremental options have a better chance of fitting you well than frames with four options that will use widely varying stem and seatpost lengths to got a semi-proper fit.