I'm not entirely convinced something hasn't been broken recently when it comes to REing.
I'm seeing much, much more effort being required to proc a schematic...consistently...than I've ever seen before.
You really have to take a fair amount of data to prove that. Complaints about random number generators seem to dog every MMO I've played, but whenever someone actually sits down to take the required data they find that the law of large numbers does eventually prove the RNG is working.
I had one especially bad streak of luck recently. Something like 30 or more failures before finally getting the schematic. Then shortly afterward... three schematics in a row.