Should give you an idea how some of these entry parts are several years behind in capabilities, and non-threatening to any mainstream tablets. In fact, I looked up several others that all said that 3DMark and other intensive benchmarks crashed consistently, and so they could not post a score.
Those included phones with Adreno 203 and PowerVR 531 - both very old graphics cores showing up in brand new entry phone models. Some people will claim that sub-$99 tablets with these parts will be threats to Intel's share of the market, but I don't think a lot of people will be interested in compromising so much just to have a cheaper product.
Low costs are good, but only if the quality is still "good enough". I do not think these designs provide a good enough performance for a good experience, and the reviews seem to play that out.
Haswell-Y isn't really suitable for a tablet imho. The base clock in LFM (SDP) mode is pretty low to achieve 6W or 4.5W SDP and it has only two cores. Beside this the price is probably way higher than Bay Trail-T. Broadwell-Y should be the first Core uarch based capable tablet SoC, I'm more interested in this.