#2 SUPERSTAR OVEREXPOSURE
With things being the way they are now, any superstar can take a week or even more off, without really being missed. Even a John Cena, or Dean Ambrose or someone along those lines can take a week or two off, come back and still be top level stars.
Now imagine a roster cut in half. Even if you draft a couple of NXT stars, the talent pool is going to get depleted in major way.
With that in mind, it leaves a smaller amount to of talent to cover if someone takes off, so instead of seeing someone like Sheamus being showcased in a mid-card match or rivalry every other week or so, now you have to use these guys, as well as throw them into a bigger spotlight on a weekly basis.
The lack of talent, while could result in a worthy star getting a better push, it could also lead to unworthy talent getting a push he or she doesn't deserve.