Hi G, firstly the importance of a stable and accurate stereo balance in mastering (which is what I suggested) is not false.
I completely agree that quality of equipment is a factor in the recording process, it would be foolish to say anything else.
Quality needs to be front-loaded in the process, not held off until it's too late.
Under ideal circumstance equipment choice is largely superceded (in terms of subjective recording quality) by the pointers I suggested above, starting with room choice(i.e. acoustics), mic position. mic technique, be it mono or (XY, Blumlein, ORTF, spaced pair,M-S micing) and mic choice I know this as I have recorded 100's of straight to stereo music sessions of widely known artists.
As a mastering engineer I make decisions on other peoples hard work. I don't take that lightly and therefore when I choose equipment that is specifically clean in nature it needs to pass audio through without detriment, this requires a good design, and high quality electronic components, the VLAII does not meet this standard IMO in compression action, technical facility (no side chain) or basic audio pass through (I can copy it using any LPF). Whether it works as a device for recording is your choice and your choice alone.
As far as comments regarding when mixes are ready for mastering, times have changed, we are no longer in 1985 when budgets were huge and people employed.... gasp........ "audio professionals". If I hear a mix that does not quite cut it I ask for adjustments (if the client has requested my input). Sometimes todays "mixers" are not confident enough to know when the mix is good so chances are the input from a mastering engineer is invaluable.
Mastering has changed and it is fact that, you do get asked for mix input, mixes do get sent in not optimized, there are people who are less well trained than your professional audio engineer of the 80's/90's and people are often looking for mastering to correct some problems they could not resolve themselves. Whether these problems are corrected through mix tweaks (under advice from a mastering engineer) or mastering the end result is better.
Summing up, recording is important and mastering is important. There is a general expectation that mastering uses high quality equipment to effect
changes to the music irrelevant of whether it was produced using $3,000.00 or $3,000,000.00 of equipment in the record/mix phase.
cheers