Have transports improved for Redbook CD playback?

First,

Transports do make a difference in the performance of the DAC it is driving.  I highly recommend that you take a look at thread I started on the Jay's Audio CDT-2 MK-2 transport that I'm reviewing for hometheaterreview.com.  I have a very long history with some of the highest regarded transports in the last twenty years and based on build quality and more importantly performance this 2K transport is a true bargain.

Celander, I found the Oppo 83SE was a fine universal DVD player back in its day but a quality dedicated CD player will sound much better for Redbook CD playback. I would also recommend an Esoteric unit as others have. They are built like tanks and sound excellent.

What’s it mean to be a “single speed player,” such as the Primeforce CDT-8 Pro?

Are universal players multi-speed players? And don’t Redbook players vary speed as a function of disc reading location? 

I looked at Jay's Audio transport offerings, I was very surprised that they do not have Toslink

For me the answer is simple: VRDS-Neo... The only transport which solves the problem of badly pressed CDs (as described at square-2.com), and this is what I will be getting for myself (with Schiit or Naim DAC) for an upgrade from my present CDS3/Wadia 781i... All these pains of reducing external vibrations seem slightly irrelevant to me, once I measured that the most vibration onto CD/SACD mechanism is actually coming from the inside, from the badly pressed CDs... 
So far I bought all available "CD mats" which promise to reduce CD vibration while spinning, if any will reduce it, I will post an update to my blog. But VRDS-Neo clamps CD to a heavy "top-platter" and any pressing glitches should be reduced drastically.